diff --git a/googlemock/docs/cook_book.md b/googlemock/docs/cook_book.md
index c29d4c32..cfe5858f 100644
--- a/googlemock/docs/cook_book.md
+++ b/googlemock/docs/cook_book.md
@@ -520,7 +520,7 @@ argument matchers:
 
 ```cpp
 ON_CALL(factory, DoMakeTurtle)
-    .WillByDefault(MakeMockTurtle());
+    .WillByDefault(Return(MakeMockTurtle()));
 ```
 
 ### Alternative to Mocking Concrete Classes