diff --git a/src/libraries/System.Text.Json/src/System/Text/Json/Serialization/JsonClassInfo.cs b/src/libraries/System.Text.Json/src/System/Text/Json/Serialization/JsonClassInfo.cs
index dcc2a92e18dd15..e6fc4cc6cce7f8 100644
--- a/src/libraries/System.Text.Json/src/System/Text/Json/Serialization/JsonClassInfo.cs
+++ b/src/libraries/System.Text.Json/src/System/Text/Json/Serialization/JsonClassInfo.cs
@@ -138,7 +138,7 @@ public JsonClassInfo(Type type, JsonSerializerOptions options)
                     {
                         CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
 
-                        PropertyInfo[] properties = type.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+                        PropertyInfo[] properties = type.GetProperties(BindingFlags.Instance | BindingFlags.Public);
 
                         Dictionary<string, JsonPropertyInfo> cache = CreatePropertyCache(properties.Length);