diff --git a/Shorewall/firewall b/Shorewall/firewall
index b1330dd93..41a216f3f 100755
--- a/Shorewall/firewall
+++ b/Shorewall/firewall
@@ -1957,6 +1957,8 @@ add_nat_rule() {
 	    done
 	fi
     fi
+
+    [ "x$addr" = "x0.0.0.0/0" ] && addr= 
 }
 
 #