diff --git a/ext/standard/string.c b/ext/standard/string.c
index 3832b31b46..4d5c72404f 100644
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -2835,7 +2835,7 @@ PHP_FUNCTION(lcfirst)
 }
 /* }}} */
 
-/* {{{ proto string ucwords(string str)
+/* {{{ proto string ucwords(string str [, string delims])
    Uppercase the first character of every word in a string */
 PHP_FUNCTION(ucwords)
 {