diff --git a/channels/h323/Makefile.in b/channels/h323/Makefile.in
index 7558a7ce370f47daa0e00a7f64a34cfa4c18a671..82e297e1fb60fc3fff4a79a4a7748cd46ee07ba9 100644
--- a/channels/h323/Makefile.in
+++ b/channels/h323/Makefile.in
@@ -35,7 +35,7 @@ $(SOURCES)::	Makefile ../../Makefile
 libchanh323.a:	$(OBJS)
 	ar crv $@ $(OBJS)
 
-cisco-h225.cpp::	cisco-h225.asn
+cisco-h225.cxx::	cisco-h225.asn
 	asnparser -m CISCO_H225 -c $<
 
 Makefile.ast: