diff --git a/src/bts.h b/src/bts.h
index e5733e4..2e2d146 100644
--- a/src/bts.h
+++ b/src/bts.h
@@ -216,7 +216,7 @@
 	int rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn);
 	int rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta);
 
-	void trigger_dl_ass(gprs_rlcmac_dl_tbf *tbf, gprs_rlcmac_tbf *old_tbf, const char *imsi);
+	void trigger_dl_ass(gprs_rlcmac_dl_tbf *tbf, gprs_rlcmac_tbf *old_tbf);
 	void snd_dl_ass(gprs_rlcmac_tbf *tbf, uint8_t poll, const char *imsi);
 
 	GprsMsStorage &ms_store();