diff --git a/docs/gmock_cook_book.md b/docs/gmock_cook_book.md
index 9e59b4cf..0373dca6 100644
--- a/docs/gmock_cook_book.md
+++ b/docs/gmock_cook_book.md
@@ -1489,7 +1489,7 @@ mock object and gMock.
 
 ## Setting Expectations
 
-### Knowing When to Expect {#UseOnCall}
+### <a id="knowing-when-to-expect"></a>Knowing When to Expect {#UseOnCall}
 
 **`ON_CALL`** is likely the *single most under-utilized construct* in gMock.