diff --git a/src/libraries/System.Text.Json/src/Resources/Strings.resx b/src/libraries/System.Text.Json/src/Resources/Strings.resx
index e95458c23aa61..ea57f4b7d8509 100644
--- a/src/libraries/System.Text.Json/src/Resources/Strings.resx
+++ b/src/libraries/System.Text.Json/src/Resources/Strings.resx
@@ -352,7 +352,7 @@
     <value>The data extension property '{0}.{1}' does not match the required signature of 'IDictionary&lt;string, JsonElement&gt;', 'IDictionary&lt;string, object&gt;' or 'JsonObject'.</value>
   </data>
   <data name="SerializationDuplicateTypeAttribute" xml:space="preserve">
-    <value>The type '{0}' cannot have more than one property that has the attribute '{1}'.</value>
+    <value>The type '{0}' cannot have more than one member that has the attribute '{1}'.</value>
   </data>
   <data name="SerializationNotSupportedType" xml:space="preserve">
     <value>The type '{0}' is not supported.</value>
diff --git a/src/libraries/System.Text.Json/src/System/Text/Json/ThrowHelper.Serialization.cs b/src/libraries/System.Text.Json/src/System/Text/Json/ThrowHelper.Serialization.cs
index ab7cf89e8afb5..0bffe0f2c95bb 100644
--- a/src/libraries/System.Text.Json/src/System/Text/Json/ThrowHelper.Serialization.cs
+++ b/src/libraries/System.Text.Json/src/System/Text/Json/ThrowHelper.Serialization.cs
@@ -421,7 +421,7 @@ public static void ThrowInvalidOperationException_SerializationDuplicateTypeAttr
         [MethodImpl(MethodImplOptions.NoInlining)]
         public static void ThrowInvalidOperationException_SerializationDuplicateTypeAttribute<TAttribute>(Type classType)
         {
-            throw new InvalidOperationException(SR.Format(SR.SerializationDuplicateTypeAttribute, classType, typeof(Attribute)));
+            throw new InvalidOperationException(SR.Format(SR.SerializationDuplicateTypeAttribute, classType, typeof(TAttribute)));
         }
 
         [DoesNotReturn]