diff --git a/package/6in4/Makefile b/package/6in4/Makefile
index c56b9c57c..b9fa220df 100644
--- a/package/6in4/Makefile
+++ b/package/6in4/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=6in4
 PKG_VERSION:=5
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 include $(INCLUDE_DIR)/package.mk
 
diff --git a/package/6in4/files/6in4.hotplug b/package/6in4/files/6in4.hotplug
index b695b527e..790edc0e1 100644
--- a/package/6in4/files/6in4.hotplug
+++ b/package/6in4/files/6in4.hotplug
@@ -32,7 +32,7 @@ if [ "$ACTION" = ifup ]; then
 			config_get password "$cfg" password
 
 			[ -n "$tunnelid" ] && [ -n "$username" ] && [ -n "$password" ] && {
-				[ "${#password}" != 32 ] || [ -n "$(echo "$password" | sed 's/[a-z0-9]//g')" ] && {
+				[ "${#password}" == 32 -a -z "${password//[a-f0-9]/}" ] && {
 					password="$(echo -n "$password" | md5sum)"; password="${password%% *}"
 				}
 				uci_set_state network "$cfg" ipaddr "$wanip"