diff --git a/library/RLCMAC_CSN1_Templates.ttcn b/library/RLCMAC_CSN1_Templates.ttcn
index 21a7c46..727d4b8 100644
--- a/library/RLCMAC_CSN1_Templates.ttcn
+++ b/library/RLCMAC_CSN1_Templates.ttcn
@@ -196,6 +196,7 @@
 	};
 
 	template UlAckNackEgprs tr_UlAckNackEgprs(template GprsTlli tlli := *) := {
+		msg_excape := '00'B,
 		ch_coding_cmd := ?,
 		resegment := ?,
 		preemptive_tx := ?,