diff --git a/src/commands/addClass.ts b/src/commands/addClass.ts
index 50be01cb6..3d921b0db 100644
--- a/src/commands/addClass.ts
+++ b/src/commands/addClass.ts
@@ -40,7 +40,9 @@ export async function addClassCommand(classPath: string, classType: string) {
     const classExtension = className.split(".").pop();
 
     if (!classExtension || className.split(".").length < 2) {
-        throw new UserError("Please provide a class name with a valid class extension.");
+        throw new UserError(
+            `Please provide a class name with a valid class extension. Currently supporting:${supportedExtensionsString}`,
+        );
     }
 
     // check if class is supported