diff --git a/ext/pdo/pdo_stmt.c b/ext/pdo/pdo_stmt.c
index 78ccc7402bd..21b8040c7d9 100755
--- a/ext/pdo/pdo_stmt.c
+++ b/ext/pdo/pdo_stmt.c
@@ -2183,7 +2183,7 @@ static PHP_METHOD(PDOStatement, debugDumpParams)
 				php_stream_printf(out TSRMLS_CC, "Key: Name: [%d] %.*s\n", len, len, str);
 			}
 
-			php_stream_printf(out TSRMLS_CC, "paramno=%d\nname=[%d] \"%.*s\"\nis_param=%d\nparam_type=%d\n",
+			php_stream_printf(out TSRMLS_CC, "paramno=%ld\nname=[%d] \"%.*s\"\nis_param=%d\nparam_type=%d\n",
 				param->paramno, param->namelen, param->namelen, param->name ? param->name : "",
 				param->is_param,
 				param->param_type);