diff --git a/common/installer.sh b/common/installer.sh
index 68d2eaa4..36aed86e 100644
--- a/common/installer.sh
+++ b/common/installer.sh
@@ -522,11 +522,6 @@ install_openwrt_firewall()
 {
 	echo \* installing firewall script $1
 	
-	[ -n "MODE" ] || {
-		echo should specify MODE in $ZAPRET_CONFIG
-		exitp 7
-	}
-	
 	echo "linking : $FW_SCRIPT_SRC => $OPENWRT_FW_INCLUDE"
 	ln -fs "$FW_SCRIPT_SRC" "$OPENWRT_FW_INCLUDE"
 	
diff --git a/common/ipt.sh b/common/ipt.sh
index 3e4be7d4..9c0e80b3 100644
--- a/common/ipt.sh
+++ b/common/ipt.sh
@@ -43,7 +43,7 @@ ipt6_add_del()
 }
 ipt6a_add_del()
 {
-	on_off_function ipt6 ipt6a_del "$@"
+	on_off_function ipt6a ipt6_del "$@"
 }
 
 is_ipt_flow_offload_avail()