diff --git a/pcu/GPRS_Components.ttcn b/pcu/GPRS_Components.ttcn
index 6f3e3e27a..e73609ff1 100644
--- a/pcu/GPRS_Components.ttcn
+++ b/pcu/GPRS_Components.ttcn
@@ -331,7 +331,11 @@ runs on MS_BTS_IFACE_CT return RlcmacDlBlock {
 	       }
 	} else if (match(dl_block, tr_RLCMAC_DL_PACKET_ASS)) {
 		ms.dl_tbf := f_dltbf_new_from_ass_pacch(dl_block);
-		/* TODO: match tlli from ms.dl_tbf.ass.pacch with ms.tlli), or error */
+		if (ischosen(ms.dl_tbf.ass.pacch.tfi_or_tlli.tlli) and
+		    ms.dl_tbf.ass.pacch.tfi_or_tlli.tlli.tlli != ms.tlli) {
+			setverdict(fail, "Wrong TLLI ", ms.dl_tbf.ass.pacch.tfi_or_tlli.tlli.tlli, " received vs exp ", ms.tlli);
+			f_shutdown(__BFILE__, __LINE__);
+		}
 	} else {
 		setverdict(fail, "Should not happen:", dl_block);
 		f_shutdown(__BFILE__, __LINE__);