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	2013-01-02 16:28:28.056893791 +0100
+++ ppp-2.4.5/pppd/Makefile.linux	2013-01-02 16:29:50.815104864 +0100
@@ -61,7 +61,7 @@
 USE_TDB=y
 
 HAS_SHADOW=y
-#USE_PAM=y
+USE_PAM=y
 HAVE_INET6=y
 
 # Enable plugins