diff --git a/Include/rangeobject.h b/Include/rangeobject.h
index f2d6788..39d20c6 100644
--- a/Include/rangeobject.h
+++ b/Include/rangeobject.h
@@ -38,4 +38,4 @@
 
 #define is_rangeobject(op) ((op)->ob_type == &Rangetype)
 
-extern object *newrangeobject PROTO((long, long, long));
+extern object *newrangeobject PROTO((long, long, long, int));