diff --git a/Shorewall/shorewall b/Shorewall/shorewall
index b135d7dfd..92416e4d4 100755
--- a/Shorewall/shorewall
+++ b/Shorewall/shorewall
@@ -1396,7 +1396,7 @@ usage() # $1 = exit status
     echo "   show macros"
     echo "   show [ -x ] mangle|nat|raw|routing"
     echo "   show policies"
-    echo "   show tc"
+    echo "   show tc [ <device> ]"
     echo "   show vardir"
     echo "   show zones"
     echo "   start [ -f ] [ -n ] [ -p ] [ <directory> ]"