--- IO-AIO/AIO.xs	2006/10/23 18:48:08	1.58
+++ IO-AIO/AIO.xs	2006/10/23 18:56:27	1.59
@@ -1295,7 +1295,7 @@
         req_cancel (req);
 
 void
-cb (aio_req req, SV *callback=&PL_sv_undef)
+cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
 	CODE:
         SvREFCNT_dec (req->callback);
         req->callback = newSVsv (callback);