diff --git a/openbsc/include/openbsc/bsc_api.h b/openbsc/include/openbsc/bsc_api.h
index 5216c9f..135565b 100644
--- a/openbsc/include/openbsc/bsc_api.h
+++ b/openbsc/include/openbsc/bsc_api.h
@@ -11,7 +11,7 @@
 struct bsc_api {
 	void (*sapi_n_reject)(struct gsm_subscriber_connection *conn, int dlci);
 	void (*cipher_mode_compl)(struct gsm_subscriber_connection *conn,
-				  struct msgb *msg, uint16_t ind);
+				  struct msgb *msg, uint16_t chosen_encr);
 	int (*compl_l3)(struct gsm_subscriber_connection *conn,
 			struct msgb *msg, uint16_t chosen_channel); 
 	void (*dtap)(struct gsm_subscriber_connection *conn, struct msgb *msg);
@@ -27,6 +27,8 @@
 int bsc_api_init(struct gsm_network *network, struct bsc_api *api);
 int gsm0808_submit_dtap(struct gsm_subscriber_connection *conn, struct msgb *msg, int link_id);
 int gsm0808_assign_req(struct gsm_subscriber_connection *conn, int chan_type, int audio);
+int gsm0808_cipher_mode(struct gsm_subscriber_connection *conn, int cipher,
+			uint8_t *key, int len);
 int gsm0808_page(struct gsm_bts *bts, unsigned int page_group,
 		 unsigned int mi_len, uint8_t *mi, int chan_type);
 int gsm0808_clear(struct gsm_subscriber_connection *conn);
diff --git a/openbsc/src/bsc_api.c b/openbsc/src/bsc_api.c
index e5c9e9c..44ec420 100644
--- a/openbsc/src/bsc_api.c
+++ b/openbsc/src/bsc_api.c
@@ -132,6 +132,12 @@
 	return 0;
 }
 
+int gsm0808_cipher_mode(struct gsm_subscriber_connection *conn, int cipher,
+			uint8_t *key, int len)
+{
+	return -1;
+}
+
 int gsm0808_clear(struct gsm_subscriber_connection* conn)
 {
 	struct gsm_lchan *lchan;