diff --git a/user_guide_src/source/libraries/caching.rst b/user_guide_src/source/libraries/caching.rst
index 91a78432a507..06a8ecf3815c 100644
--- a/user_guide_src/source/libraries/caching.rst
+++ b/user_guide_src/source/libraries/caching.rst
@@ -100,7 +100,7 @@ Class Reference
 	:param	int	$ttl: Time To Live, in seconds (default 60)
 	:param	bool	$raw: Whether to store the raw value
 	:returns:	TRUE on success, FALSE on failure
-	:rtype:	string
+	:rtype:	bool
 
 	This method will save an item to the cache store. If saving fails, the
 	method will return FALSE.