diff --git a/Shorewall/Macros/macro.mDNS b/Shorewall/Macros/macro.mDNS
index ced13c8ac..c1acc536b 100644
--- a/Shorewall/Macros/macro.mDNS
+++ b/Shorewall/Macros/macro.mDNS
@@ -1,7 +1,7 @@
 #
-# Shorewall version 4 - Multicast DNS Macro. The SOURCE in rules that invoke
-# 	    	      		      	     this macro should be where the
-#					     network services are.
+# Shorewall version 4 - Multicast DNS Macro -- this macro assumes that only
+#                       the DEST zone sends mDNS queries. If both zones send
+#                       queries, use the mDNSbi macro.
 #
 # /usr/share/shorewall/macro.mDNS
 #