diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 8a020db..1b985e1 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -132,8 +132,10 @@
 gsm48_rr_att_tlvdef;
 
 gsm_7bit_decode;
+gsm_7bit_decode_ussd;
 gsm_7bit_decode_hdr;
 gsm_7bit_encode;
+gsm_7bit_encode_ussd;
 gsm_7bit_encode_oct;
 
 gsm_arfcn2band;