diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 6234d94..32e4ce9 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -148,6 +148,7 @@
 gsm0808_bssap_name;
 gsm0808_bssmap_name;
 gsm0808_cause_name;
+gsm0808_cause_class_name;
 gsm0808_create_ass;
 gsm0808_create_assignment_completed;
 gsm0808_create_ass_compl;