diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index d49401d..9aa9683 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -244,6 +244,7 @@
 gsm0808_enc_lcls;
 gsm0808_dec_lcls;
 gsm0808_msgb_put_cell_id_u;
+gsm0808_decode_cell_id_u;
 
 gsm29118_msgb_alloc;
 gsm29118_create_alert_req;