diff --git a/ext/pdo/pdo_stmt.c b/ext/pdo/pdo_stmt.c
index 9a84fe706795f..8110851969787 100644
--- a/ext/pdo/pdo_stmt.c
+++ b/ext/pdo/pdo_stmt.c
@@ -101,6 +101,7 @@ ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_pdostatement_setfetchmode, 0, 0, 1)
 	ZEND_ARG_INFO(0, mode)
+	ZEND_ARG_INFO(0, param)
 	ZEND_ARG_INFO(0, params)
 ZEND_END_ARG_INFO()
 /* }}} */