diff --git a/library/RLCMAC_CSN1_Types.ttcn b/library/RLCMAC_CSN1_Types.ttcn
index 5ef7c44..1ffb85b 100644
--- a/library/RLCMAC_CSN1_Types.ttcn
+++ b/library/RLCMAC_CSN1_Types.ttcn
@@ -482,6 +482,7 @@
 		variant (cont_res_tlli) "BYTEORDER(first)"
 	};
 	type record UlAckNackEgprs {
+		BIT2			msg_excape ('00'B),
 		EgprsChCodingCommand	ch_coding_cmd,
 		BIT1			resegment,
 		BIT1			preemptive_tx,