diff --git a/Samples/Universal/shorewall.conf b/Samples/Universal/shorewall.conf
index 737641019..34f7e68c3 100644
--- a/Samples/Universal/shorewall.conf
+++ b/Samples/Universal/shorewall.conf
@@ -190,7 +190,7 @@ LOAD_HELPERS_ONLY=Yes
 
 REQUIRE_INTERFACE=Yes
 
-FORWARD_CLEAR_MARK=Yes
+FORWARD_CLEAR_MARK=
 
 COMPLETE=Yes