diff --git a/lib/iptables.inc b/lib/iptables.inc
index 16abaaf..faa69d9 100644
--- a/lib/iptables.inc
+++ b/lib/iptables.inc
@@ -183,12 +183,10 @@ function enable_mss_clamp {
 			[[ ${type} == "-" ]] && type="out"
 			[[ ${type} == "out" ]] && type="${OutFilter}"
 			[[ ${type} == "fwd" ]] && type="${FwdFilter}"
-			[[ ${type} == "in" ]] && type="${InFilter}"
 			[[ -z ${msssize} ]] && msssize="-"
 			[[ ${msssize} != "-" ]] && msssize="--set-mss ${msssize}"
 			[[ ${msssize} == "-" ]] && msssize="--clamp-mss-to-pmtu"
 			#[[ ${interface} != "all" ]] && interface="-o ${interface}"
-			[[ ${type} == "${InFilter}" ]] && interface="-i ${interface}"
 			[[ ${type} == "${OutFilter}" ]] && interface="-o ${interface}"
 			[[ ${isallinterfaces} == "yes" ]] && interface=""
 			${debug} ${DebugColor} "${FUNCNAME}:${DEFAULT_COLOR} Read: ${interface} ${mss} ${type} ${msssize}"