diff --git a/ext/standard/string.c b/ext/standard/string.c
index 0a5da0be408..363de4cec03 100644
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -6006,7 +6006,7 @@ PHP_FUNCTION(strip_tags)
 }
 /* }}} */
 
-/* {{{ proto string setlocale(mixed category, string locale [, string ...])
+/* {{{ proto string setlocale(mixed category, string locale [, string ...]) U
    Set locale information */
 PHP_FUNCTION(setlocale)
 {