diff -Nru ppp-2.4.5.orig/pppd/Makefile.linux ppp-2.4.5/pppd/Makefile.linux
--- ppp-2.4.5.orig/pppd/Makefile.linux	2009-11-16 23:26:07.000000000 +0100
+++ ppp-2.4.5/pppd/Makefile.linux	2013-01-02 16:25:11.884763886 +0100
@@ -62,7 +62,7 @@
 
 HAS_SHADOW=y
 #USE_PAM=y
-#HAVE_INET6=y
+HAVE_INET6=y
 
 # Enable plugins
 PLUGIN=y