diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 917a77d..7eebe7f 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -270,6 +270,8 @@
 
 osmo_apn_qualify;
 osmo_apn_qualify_from_imsi;
+osmo_apn_to_str;
+osmo_apn_from_str;
 
 local: *;
 };