diff --git a/src/sgsn/Makefile.am b/src/sgsn/Makefile.am
index ba752ad..75f9608 100644
--- a/src/sgsn/Makefile.am
+++ b/src/sgsn/Makefile.am
@@ -62,6 +62,7 @@
 	sgsn_libgtp.c \
 	gprs_llc.c \
 	gprs_llc_vty.c \
+	pdpctx.c \
 	sgsn_ctrl.c \
 	sgsn_auth.c \
 	gprs_subscriber.c \