diff --git a/include/osmocom/gsm/gsm48.h b/include/osmocom/gsm/gsm48.h
index 16a625a..1e7498a 100644
--- a/include/osmocom/gsm/gsm48.h
+++ b/include/osmocom/gsm/gsm48.h
@@ -20,6 +20,8 @@
 const char *gsm48_cc_msg_name(uint8_t msgtype);
 const char *rr_cause_name(uint8_t cause);
 
+int gsm48_decode_lai(struct gsm48_loc_area_id *lai, uint16_t *mcc,
+		     uint16_t *mnc, uint16_t *lac);
 void gsm48_generate_lai(struct gsm48_loc_area_id *lai48, uint16_t mcc,
 			uint16_t mnc, uint16_t lac);
 int gsm48_generate_mid_from_tmsi(uint8_t *buf, uint32_t tmsi);