--- rp-pppoe-3.8.orig/src/Makefile.in
+++ rp-pppoe-3.8/src/Makefile.in
@@ -79,7 +79,7 @@
 	@CC@ -o pppoe-relay relay.o if.o debug.o common.o
 
 pppoe.o: pppoe.c pppoe.h
-	@CC@ $(CFLAGS) '-DVERSION="$(VERSION)"' -c -o pppoe.o pppoe.c
+	@CC@ $(CFLAGS) -DAUTO_IFUP '-DVERSION="$(VERSION)"' -c -o pppoe.o pppoe.c
 
 discovery.o: discovery.c pppoe.h
 	@CC@ $(CFLAGS) '-DVERSION="$(VERSION)"' -c -o discovery.o discovery.c