diff --git a/channels/h323/Makefile.in b/channels/h323/Makefile.in
index 083250f5546053e2ca8ddd1f1ac476ed282d7d4f..5f949ca7dba216d13bc614896b617195e5858ed5 100644
--- a/channels/h323/Makefile.in
+++ b/channels/h323/Makefile.in
@@ -24,7 +24,9 @@ ifndef OPENH323DIR
 OPENH323DIR=@OPENH323DIR@
 endif
 
+ifneq ($(wildcard $(OPENH323DIR)/openh323u.mak),)
 include $(OPENH323DIR)/openh323u.mak
+endif
 
 notrace::
 	$(MAKE) NOTRACE=1 opt