diff --git a/package/6to4/Makefile b/package/6to4/Makefile
index 45639646c..fc36d0f15 100644
--- a/package/6to4/Makefile
+++ b/package/6to4/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2010-2011 OpenWrt.org
+# Copyright (C) 2010-2012 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=6to4
-PKG_VERSION:=7
+PKG_VERSION:=8
 PKG_RELEASE:=1
 
 include $(INCLUDE_DIR)/package.mk
diff --git a/package/6to4/files.old/6to4.sh b/package/6to4/files.old/6to4.sh
index f7f48e5ba..2329e0bd4 100755
--- a/package/6to4/files.old/6to4.sh
+++ b/package/6to4/files.old/6to4.sh
@@ -24,6 +24,10 @@ test_6to4_rfc1918()
 	[ $1 -eq  10 ] && return 0
 	[ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0
 	[ $1 -eq 172 ] && [ $2 -ge  16 ] && [ $2 -le  31 ] && return 0
+
+	# RFC 6598
+	[ $1 -eq 100 ] && [ $2 -ge  64 ] && [ $2 -le 127 ] && return 0
+
 	return 1
 }
 
diff --git a/package/6to4/files/6to4.sh b/package/6to4/files/6to4.sh
index 682538564..5cbdce79a 100755
--- a/package/6to4/files/6to4.sh
+++ b/package/6to4/files/6to4.sh
@@ -31,6 +31,10 @@ test_6to4_rfc1918()
 	[ $1 -eq  10 ] && return 0
 	[ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0
 	[ $1 -eq 172 ] && [ $2 -ge  16 ] && [ $2 -le  31 ] && return 0
+
+	# RFC 6598
+	[ $1 -eq 100 ] && [ $2 -ge  64 ] && [ $2 -le 127 ] && return 0
+
 	return 1
 }
 
@@ -221,7 +225,7 @@ proto_6to4_teardown() {
 }
 
 proto_6to4_init_config() {
-	no_device=1             
+	no_device=1
 	available=1
 
 	proto_config_add_string "ipaddr"