diff --git a/lib/functions.sh b/lib/functions.sh
index 11b00e5..e6c5dec 100755
--- a/lib/functions.sh
+++ b/lib/functions.sh
@@ -13,6 +13,7 @@ log() {
 
 printUsage() {
 	echo "Usage: bridgehead start|stop|update|install|uninstall PROJECTNAME"
+	echo "PROJECTNAME should be one of ccp|nngm|gbn"
 }
 
 checkRequirements() {