diff --git a/bacnet-stack/Makefile b/bacnet-stack/Makefile
index 85346215..7afba096 100644
--- a/bacnet-stack/Makefile
+++ b/bacnet-stack/Makefile
@@ -1,4 +1,4 @@
-all: readprop writeprop readfile writefile reinit server dcc whohas whois
+all: readprop writeprop readfile writefile reinit server dcc whohas whois timesync
 	@echo "utilities are in demo/xx directories"
 
 clean: \
@@ -9,6 +9,7 @@ clean: \
 	demo/server/Makefile \
 	demo/dcc/Makefile \
 	demo/whohas/Makefile \
+	demo/timesync/Makefile \
 	demo/whois/Makefile
 	( cd demo/readprop ; make clean )
 	( cd demo/writeprop ; make clean )
@@ -18,6 +19,7 @@ clean: \
 	( cd demo/server ; make clean )
 	( cd demo/dcc ; make clean )
 	( cd demo/whohas ; make clean )
+	( cd demo/timesync ; make clean )
 	( cd demo/whois ; make clean )
 
 readprop: demo/readprop/Makefile
@@ -44,5 +46,8 @@ dcc: demo/dcc/Makefile
 whohas: demo/whohas/Makefile
 	( cd demo/whohas ; make clean ; make )
 
+timesync: demo/timesync/Makefile
+	( cd demo/timesync ; make clean ; make )
+
 whois: demo/whois/Makefile
 	( cd demo/whois ; make clean ; make )