diff -ur sstp-client-1.0.9.org/configure.ac sstp-client-1.0.9/configure.ac
--- sstp-client-1.0.9.org/configure.ac	2013-01-13 22:32:38.000000000 +0100
+++ sstp-client-1.0.9/configure.ac	2014-11-02 18:38:31.983399426 +0100
@@ -92,7 +92,8 @@
 if test -n "$with_pppd_plugin_dir" ; then
     PPPD_PLUGIN_DIR="$with_pppd_plugin_dir"
 else
-    PPPD_PLUGIN_DIR="${libdir}/pppd/2.4.5"
+    INSTVERSION=`pppd -? 2>&1 | grep "pppd version " | sed 's/pppd version //g'`
+    PPPD_PLUGIN_DIR="${libdir}/pppd/${INSTVERSION}"
 fi
 AC_SUBST(PPPD_PLUGIN_DIR)