Introduce gsm48_mi_type_name() function
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index c291428..0c0d9f7 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -137,6 +137,7 @@
 gsm48_number_of_paging_subchannels;
 gsm48_parse_ra;
 gsm48_rr_att_tlvdef;
+gsm48_mi_type_name;
 
 gsm_7bit_decode;
 gsm_7bit_decode_ussd;