diff --git a/ext/wddx/wddx.c b/ext/wddx/wddx.c
index 33298727b7c..693ccef7b1c 100644
--- a/ext/wddx/wddx.c
+++ b/ext/wddx/wddx.c
@@ -1200,7 +1200,7 @@ PHP_FUNCTION(wddx_packet_end)
 }
 /* }}} */
 
-/* {{{ proto int wddx_add_vars(resource packet_id,  mixed var_names [, mixed ...])
+/* {{{ proto bool wddx_add_vars(resource packet_id,  mixed var_names [, mixed ...])
    Serializes given variables and adds them to packet given by packet_id */
 PHP_FUNCTION(wddx_add_vars)
 {