diff --git a/ext/mysql/php_mysql.c b/ext/mysql/php_mysql.c
index f1aab4eed9c..8c19a043e68 100644
--- a/ext/mysql/php_mysql.c
+++ b/ext/mysql/php_mysql.c
@@ -1317,7 +1317,7 @@ PHP_FUNCTION(mysql_affected_rows)
 /* }}} */
 
 
-/* {{{ proto char mysql_escape_string([char string])
+/* {{{ proto string mysql_escape_string(string to_be_escaped)
    Escape string for mysql query */
 PHP_FUNCTION(mysql_escape_string)
 {