diff --git a/install_easy.sh b/install_easy.sh
index fb50c34..3e5bb48 100755
--- a/install_easy.sh
+++ b/install_easy.sh
@@ -861,7 +861,7 @@ install_openwrt()
 	install_binaries
 	check_dns
 
-	FWTYPE_OLD=$FWTYPE
+	local FWTYPE_OLD=$FWTYPE
 
 	echo \* stopping current firewall rules/daemons
 	"$INIT_SCRIPT_SRC" stop_fw