diff --git a/Rules/CompatibilityRules/UseCompatibleSyntax.cs b/Rules/CompatibilityRules/UseCompatibleSyntax.cs
index 9b9196d40..22f44b86f 100644
--- a/Rules/CompatibilityRules/UseCompatibleSyntax.cs
+++ b/Rules/CompatibilityRules/UseCompatibleSyntax.cs
@@ -347,6 +347,7 @@ public override AstVisitAction VisitTypeDefinition(TypeDefinitionAst typeDefinit
 
                 string message = string.Format(
                     CultureInfo.CurrentCulture,
+                    Strings.UseCompatibleSyntaxError,
                     "type definition",
                     "class MyClass { ... } | enum MyEnum { ... }",
                     "3,4");