diff --git a/src/oop_macro.md b/src/oop_macro.md
index 54188d9..cb0f24c 100644
--- a/src/oop_macro.md
+++ b/src/oop_macro.md
@@ -29,7 +29,7 @@ class(Dog of Animal):
   method vocalize: string = "woof"
 
 class(Cat of Animal):
-  method vocalize: string = "woof"
+  method vocalize: string = "meow"
 
 # a short test (used later)
 proc run_test() =