diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 1508e83..634ad29 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -733,8 +733,9 @@
 {
     int i, result;
     PyObject *s, *l = PyTuple_New(num_fields);
-    if (!l) return 0;
-    for(i = 0; i < num_fields; i++) {
+    if (!l)
+        return 0;
+    for (i = 0; i < num_fields; i++) {
         s = PyString_FromString(attrs[i]);
         if (!s) {
             Py_DECREF(l);