diff --git a/ggsn/Makefile.am b/ggsn/Makefile.am
index 05211a6..b72006e 100644
--- a/ggsn/Makefile.am
+++ b/ggsn/Makefile.am
@@ -1,11 +1,11 @@
 bin_PROGRAMS = ggsn
 
-CFLAGS = -O2 -fno-builtin -Wall -ansi -DSBINDIR='"$(sbindir)"' -lgtp
+LDFLAGS = -Wl,--rpath -Wl,/usr/local/lib
+
+CFLAGS = -O2 -D_GNU_SOURCE -fno-builtin -Wall -ansi -DSBINDIR='"$(sbindir)"' -lgtp
 
 ggsn_SOURCES = ggsn.c tun.c tun.h cmdline.c cmdline.h
 
-cmdline.c: cmdline.ggo
-	gengetopt < cmdline.ggo --unamed-opts