diff --git a/Shorewall-core/lib.common b/Shorewall-core/lib.common
index 7df2879c7..a189c4440 100644
--- a/Shorewall-core/lib.common
+++ b/Shorewall-core/lib.common
@@ -501,7 +501,7 @@ ip_network() {
 
 #
 # The following hack is supplied to compensate for the fact that many of
-# the popular light-weight Bourne shell derivatives do not support XOR.
+# the popular light-weight Bourne shell derivatives do not support XOR ("^").
 #
 ip_broadcast() {
     local x