diff --git a/src/System.CommandLine.ApiCompatibility.Tests/ApiCompatibilityApprovalTests.System_CommandLine_api_is_not_changed.approved.txt b/src/System.CommandLine.ApiCompatibility.Tests/ApiCompatibilityApprovalTests.System_CommandLine_api_is_not_changed.approved.txt
index 4317a19b64..bd25b25078 100644
--- a/src/System.CommandLine.ApiCompatibility.Tests/ApiCompatibilityApprovalTests.System_CommandLine_api_is_not_changed.approved.txt
+++ b/src/System.CommandLine.ApiCompatibility.Tests/ApiCompatibilityApprovalTests.System_CommandLine_api_is_not_changed.approved.txt
@@ -188,6 +188,7 @@ System.CommandLine
     public System.String NoArgumentProvided(System.CommandLine.Parsing.SymbolResult symbolResult)
     public System.String RequiredArgumentMissing(System.CommandLine.Parsing.SymbolResult symbolResult)
     public System.String RequiredCommandWasNotProvided()
+    public System.String RequiredOptionWasNotProvided(Option option)
     public System.String ResponseFileNotFound(System.String filePath)
     public System.String SuggestionsTokenNotMatched(System.String token)
     public System.String UnrecognizedArgument(System.String unrecognizedArg, System.Collections.Generic.IReadOnlyCollection<System.String> allowedValues)
diff --git a/src/System.CommandLine.Tests/GlobalOptionTests.cs b/src/System.CommandLine.Tests/GlobalOptionTests.cs
index f6884378fb..8a44bf30c7 100644
--- a/src/System.CommandLine.Tests/GlobalOptionTests.cs
+++ b/src/System.CommandLine.Tests/GlobalOptionTests.cs
@@ -43,7 +43,25 @@ public void When_a_required_global_option_is_omitted_it_results_in_an_error()
                   .ContainSingle()
                   .Which.Message.Should().Be("Option '--i-must-be-set' is required.");
         }
-        
+
+        [Fact] 
+        public void When_a_required_global_option_has_multiple_aliases_the_error_message_uses_longest()
+        {
+            var rootCommand = new RootCommand();
+            var requiredOption = new Option<bool>(new[] { "-i", "--i-must-be-set" })
+            {
+                IsRequired = true
+            };
+            rootCommand.AddGlobalOption(requiredOption);
+
+            var result = rootCommand.Parse("");
+
+            result.Errors
+                  .Should()
+                  .ContainSingle()
+                  .Which.Message.Should().Be("Option '--i-must-be-set' is required.");
+        }
+
         [Fact]
         public void When_a_required_global_option_is_present_on_child_of_command_it_was_added_to_it_does_not_result_in_an_error()
         {
diff --git a/src/System.CommandLine.Tests/ParsingValidationTests.cs b/src/System.CommandLine.Tests/ParsingValidationTests.cs
index d4645a62a4..e252bb5b3b 100644
--- a/src/System.CommandLine.Tests/ParsingValidationTests.cs
+++ b/src/System.CommandLine.Tests/ParsingValidationTests.cs
@@ -177,6 +177,30 @@ public void When_a_required_option_is_not_supplied_then_an_error_is_returned()
                   .Be("Option '-x' is required.");
         }
 
+        [Fact]
+        public void When_a_required_option_has_multiple_aliases_the_error_message_uses_longest()
+        {
+            var command = new Command("command")
+            {
+                new Option<string>(new[] {"-x", "--xray" })
+                {
+                    IsRequired = true
+                }
+            };
+
+            var result = command.Parse("");
+
+            result.Errors
+                  .Should()
+                  .HaveCount(1)
+                  .And
+                  .Contain(e => e.SymbolResult.Symbol == command)
+                  .Which
+                  .Message
+                  .Should()
+                  .Be("Option '--xray' is required.");
+        }
+
         [Theory]
         [InlineData("subcommand -x arg")]
         [InlineData("-x arg subcommand")]
diff --git a/src/System.CommandLine/LocalizationResources.cs b/src/System.CommandLine/LocalizationResources.cs
index ee565ef513..0107ce06fe 100644
--- a/src/System.CommandLine/LocalizationResources.cs
+++ b/src/System.CommandLine/LocalizationResources.cs
@@ -98,6 +98,12 @@ symbolResult is CommandResult
         public virtual string RequiredCommandWasNotProvided() =>
             GetResourceString(Properties.Resources.RequiredCommandWasNotProvided);
 
+        /// <summary>
+        ///   Interpolates values into a localized string similar to Option '{0}' is required.
+        /// </summary>
+        public virtual string RequiredOptionWasNotProvided(Option option) =>
+            GetResourceString(Properties.Resources.RequiredOptionWasNotProvided, option.Aliases.OrderByDescending(x => x.Length).First());
+
         /// <summary>
         ///   Interpolates values into a localized string similar to Argument &apos;{0}&apos; not recognized. Must be one of:{1}.
         /// </summary>
diff --git a/src/System.CommandLine/Parsing/ParseResultVisitor.cs b/src/System.CommandLine/Parsing/ParseResultVisitor.cs
index ce4502f740..2ed41340ed 100644
--- a/src/System.CommandLine/Parsing/ParseResultVisitor.cs
+++ b/src/System.CommandLine/Parsing/ParseResultVisitor.cs
@@ -360,8 +360,9 @@ private void ValidateCommandResult()
                         {
                             AddErrorToResult(
                                 _innermostCommandResult,
-                                new ParseError($"Option '{option.Aliases.First()}' is required.",
-                                               _innermostCommandResult));
+                                new ParseError(
+                                    _rootCommandResult.LocalizationResources.RequiredOptionWasNotProvided(option),
+                                    _innermostCommandResult));
                         }
                     }
                 }
diff --git a/src/System.CommandLine/Properties/Resources.Designer.cs b/src/System.CommandLine/Properties/Resources.Designer.cs
index 7d3ef75bf9..ddb11c322f 100644
--- a/src/System.CommandLine/Properties/Resources.Designer.cs
+++ b/src/System.CommandLine/Properties/Resources.Designer.cs
@@ -348,6 +348,15 @@ internal static string RequiredCommandWasNotProvided {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Option &apos;{0}&apos; is required..
+        /// </summary>
+        internal static string RequiredOptionWasNotProvided {
+            get {
+                return ResourceManager.GetString("RequiredOptionWasNotProvided", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Response file not found &apos;{0}&apos;..
         /// </summary>
diff --git a/src/System.CommandLine/Properties/Resources.resx b/src/System.CommandLine/Properties/Resources.resx
index f084edc5b0..f0b101ebba 100644
--- a/src/System.CommandLine/Properties/Resources.resx
+++ b/src/System.CommandLine/Properties/Resources.resx
@@ -231,4 +231,7 @@
   <data name="ArgumentConversionCannotParseForOption" xml:space="preserve">
     <value>Cannot parse argument '{0}' for option '{1}' as expected type '{2}'.</value>
   </data>
+  <data name="RequiredOptionWasNotProvided" xml:space="preserve">
+    <value>Option '{0}' is required.</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/System.CommandLine/Properties/xlf/Resources.cs.xlf b/src/System.CommandLine/Properties/xlf/Resources.cs.xlf
index 5600551bac..86c81955a1 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.cs.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.cs.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.de.xlf b/src/System.CommandLine/Properties/xlf/Resources.de.xlf
index 6095ba13c5..e47d4bc1ee 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.de.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.de.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.es.xlf b/src/System.CommandLine/Properties/xlf/Resources.es.xlf
index 9c8605bcfe..2e85b00d2f 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.es.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.es.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.fr.xlf b/src/System.CommandLine/Properties/xlf/Resources.fr.xlf
index 26f41492c4..e8afe2a034 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.fr.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.fr.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.it.xlf b/src/System.CommandLine/Properties/xlf/Resources.it.xlf
index b69c678224..040135ce41 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.it.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.it.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.ja.xlf b/src/System.CommandLine/Properties/xlf/Resources.ja.xlf
index 7396e36bcd..aa9c63dce5 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.ja.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.ja.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.ko.xlf b/src/System.CommandLine/Properties/xlf/Resources.ko.xlf
index 3fc016a55a..f5a4950dca 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.ko.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.ko.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.pl.xlf b/src/System.CommandLine/Properties/xlf/Resources.pl.xlf
index 3821ee2f6f..b5cf7fd3f0 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.pl.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.pl.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.pt-BR.xlf b/src/System.CommandLine/Properties/xlf/Resources.pt-BR.xlf
index 74cc26d0e0..8f7e7af0d2 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.pt-BR.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.pt-BR.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.ru.xlf b/src/System.CommandLine/Properties/xlf/Resources.ru.xlf
index f9f6a823e5..6a8b8128f5 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.ru.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.ru.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.tr.xlf b/src/System.CommandLine/Properties/xlf/Resources.tr.xlf
index 661bb28dfb..c43d076b4d 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.tr.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.tr.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.zh-Hans.xlf b/src/System.CommandLine/Properties/xlf/Resources.zh-Hans.xlf
index e766fb4bb9..ca955abebc 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.zh-Hans.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.zh-Hans.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>
diff --git a/src/System.CommandLine/Properties/xlf/Resources.zh-Hant.xlf b/src/System.CommandLine/Properties/xlf/Resources.zh-Hant.xlf
index c5f24eac38..3ceabfdb3d 100644
--- a/src/System.CommandLine/Properties/xlf/Resources.zh-Hant.xlf
+++ b/src/System.CommandLine/Properties/xlf/Resources.zh-Hant.xlf
@@ -162,6 +162,11 @@
         <target state="new">Required command was not provided.</target>
         <note />
       </trans-unit>
+      <trans-unit id="RequiredOptionWasNotProvided">
+        <source>Option '{0}' is required.</source>
+        <target state="new">Option '{0}' is required.</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ResponseFileNotFound">
         <source>Response file not found '{0}'.</source>
         <target state="new">Response file not found '{0}'.</target>