diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c
index 77e1954..6d3e8b0 100644
--- a/Objects/rangeobject.c
+++ b/Objects/rangeobject.c
@@ -126,10 +126,9 @@
     PyObject_Del(r);
 }
 
-/* Return number of items in range (lo, hi, step), when arguments are PyLong
- * objects.  Return a value < 0 if & only if the true value is too large to
- * fit in a signed long.  Arguments MUST return 1 with PyLong_Check().  Return
- * -1 when there is an error.
+/* Return number of items in range (lo, hi, step) as a PyLong object,
+ * when arguments are PyLong objects.  Arguments MUST return 1 with
+ * PyLong_Check().  Return NULL when there is an error.
  */
 static PyObject*
 range_length_obj(rangeobject *r)