diff --git a/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/Analyzers/CustomTypeMarshallerAnalyzer.cs b/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/Analyzers/CustomTypeMarshallerAnalyzer.cs
index b95508feb24873..c4f219267c60ef 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/Analyzers/CustomTypeMarshallerAnalyzer.cs
+++ b/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/Analyzers/CustomTypeMarshallerAnalyzer.cs
@@ -13,7 +13,7 @@
 
 namespace Microsoft.Interop.Analyzers
 {
-    [DiagnosticAnalyzer(LanguageNames.CSharp, LanguageNames.VisualBasic)]
+    [DiagnosticAnalyzer(LanguageNames.CSharp)]
     public class CustomTypeMarshallerAnalyzer : DiagnosticAnalyzer
     {
         private const string Category = "Usage";
diff --git a/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/Analyzers/CustomTypeMarshallerFixer.cs b/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/Analyzers/CustomTypeMarshallerFixer.cs
index e59c4d14371b6a..7a349d5c6329c6 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/Analyzers/CustomTypeMarshallerFixer.cs
+++ b/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/Analyzers/CustomTypeMarshallerFixer.cs
@@ -18,7 +18,7 @@
 
 namespace Microsoft.Interop.Analyzers
 {
-    [ExportCodeFixProvider(LanguageNames.CSharp, LanguageNames.VisualBasic), Shared]
+    [ExportCodeFixProvider(LanguageNames.CSharp), Shared]
     public class CustomTypeMarshallerFixer : CodeFixProvider
     {
         private const string AddMissingCustomTypeMarshallerMembersKey = nameof(AddMissingCustomTypeMarshallerMembersKey);
diff --git a/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.csproj b/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.csproj
index ad023d7730c7d2..5806bf43f581ca 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.csproj
+++ b/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.csproj
@@ -9,6 +9,7 @@
     <!-- Disable RS2008: Enable analyzer release tracking
          Diagnostics in runtime use a different mechanism (docs/project/list-of-diagnostics.md) -->
     <NoWarn>RS2008;$(NoWarn)</NoWarn>
+    <AnalyzerLanguage>cs</AnalyzerLanguage>
 
     <!-- Packaging properties -->
     <!-- In the future LibraryImportGenerator might ship as part of a package, but meanwhile disable packaging. -->