diff --git a/include/osmocom/msc/mncc.h b/include/osmocom/msc/mncc.h
index 8a1e4ad..c8f3bfd 100644
--- a/include/osmocom/msc/mncc.h
+++ b/include/osmocom/msc/mncc.h
@@ -219,7 +219,6 @@
 
 const char *get_mncc_name(int value);
 void mncc_set_cause(struct gsm_mncc *data, int loc, int val);
-void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg);
 
 /* input from CC code into mncc_builtin */
 int int_mncc_recv(struct gsm_network *net, struct msgb *msg);
diff --git a/src/libmsc/gsm_04_08_cc.c b/src/libmsc/gsm_04_08_cc.c
index 5908db9..6148bbd 100644
--- a/src/libmsc/gsm_04_08_cc.c
+++ b/src/libmsc/gsm_04_08_cc.c
@@ -129,7 +129,7 @@
 
 /* Call Control */
 
-void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg)
+static void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg)
 {
 	net->mncc_recv(net, msg);
 }
diff --git a/src/osmo-msc/msc_main.c b/src/osmo-msc/msc_main.c
index 9808e86..913bd21 100644
--- a/src/osmo-msc/msc_main.c
+++ b/src/osmo-msc/msc_main.c
@@ -242,8 +242,8 @@
 	}
 }
 
-struct gsm_network *msc_network_alloc(void *ctx,
-				      mncc_recv_cb_t mncc_recv)
+static struct gsm_network *msc_network_alloc(void *ctx,
+					     mncc_recv_cb_t mncc_recv)
 {
 	struct gsm_network *net = gsm_network_init(ctx, mncc_recv);
 	if (!net)