diff --git a/src/libosmo-mgcp/Makefile.am b/src/libosmo-mgcp/Makefile.am
index 587bdd4..7314b22 100644
--- a/src/libosmo-mgcp/Makefile.am
+++ b/src/libosmo-mgcp/Makefile.am
@@ -40,4 +40,6 @@
 	mgcp_conn.c \
 	mgcp_stat.c \
 	mgcp_endp.c \
+	iuup_protocol.c \
+	iuup_cn_node.c \
 	$(NULL)