diff --git a/sgsnemu/Makefile.am b/sgsnemu/Makefile.am
index f2f930d..eecd9fd 100644
--- a/sgsnemu/Makefile.am
+++ b/sgsnemu/Makefile.am
@@ -1,5 +1,7 @@
 bin_PROGRAMS = sgsnemu
 
+AUTOMAKE_OPTIONS = subdir-objects
+
 AM_LDFLAGS = @EXEC_LDFLAGS@
 
 AM_CFLAGS = -O2 -D_GNU_SOURCE -fno-builtin -Wall -DSBINDIR='"$(sbindir)"' -ggdb
@@ -8,4 +10,5 @@
 
 #sgsnemu_DEPENDENCIES = ../gtp/libgtp.la
 
-sgsnemu_SOURCES = sgsnemu.c tun.c tun.h cmdline.c cmdline.h ippool.h ippool.c syserr.h syserr.c lookup.c lookup.h
+sgsnemu_SOURCES = sgsnemu.c ../lib/tun.c ../lib/tun.h cmdline.c cmdline.h ../lib/ippool.h ../lib/ippool.c ../lib/syserr.h ../lib/syserr.c ../lib/lookup.c ../lib/lookup.h
+#sgsnemu_SOURCES = sgsnemu.c cmdline.c cmdline.h