diff --git a/src/libmsc/Makefile.am b/src/libmsc/Makefile.am
index de02a17..c7fe4bb 100644
--- a/src/libmsc/Makefile.am
+++ b/src/libmsc/Makefile.am
@@ -27,6 +27,7 @@
 libmsc_a_SOURCES = \
 	call_leg.c \
 	cell_id_list.c \
+	codec_mapping.c \
 	sccp_ran.c \
 	msc_vty.c \
 	db.c \