diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 312c990..d21514c 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -98,6 +98,7 @@
 gsm0480_comp_type_names;
 gsm0480_op_code_names;
 gsm0480_msgb_alloc_name;
+gsm0480_gen_ussd_resp_7bit;
 
 gsm0502_calc_paging_group;