diff --git a/src/libmsc/Makefile.am b/src/libmsc/Makefile.am
index 9577475..fba7b53 100644
--- a/src/libmsc/Makefile.am
+++ b/src/libmsc/Makefile.am
@@ -29,6 +29,8 @@
 	cell_id_list.c \
 	codec_filter.c \
 	codec_mapping.c \
+	csd_bs.c \
+	csd_filter.c \
 	sccp_ran.c \
 	msc_vty.c \
 	db.c \