diff --git a/src/Makefile.am b/src/Makefile.am
index aeb75b2..0f5112d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -28,7 +28,8 @@
 lib_LTLIBRARIES = libosmo-ranap.la
 libosmo_ranap_la_LDFLAGS = $(AM_LDFLAGS) -version-info $(RANAP_LIBVERSION)
 libosmo_ranap_la_LIBADD = $(OSMOCORE_LIBS) $(OSMOGSM_LIBS) $(ASN1C_LIBS) $(COMMON_LDADD) ranap/libosmo-asn1-ranap.la
-libosmo_ranap_la_SOURCES = ranap_common.c ranap_encoder.c ranap_decoder.c ranap_msg_factory.c iu_helpers.c
+libosmo_ranap_la_SOURCES = ranap_common.c ranap_encoder.c ranap_decoder.c ranap_msg_factory.c iu_helpers.c \
+			   ranap_common_cn.c
 
 # build the actual HomeNodeB gateway
 #