diff --git a/library/L1CTL_Types.ttcn b/library/L1CTL_Types.ttcn
index 39732be..4273ba3 100644
--- a/library/L1CTL_Types.ttcn
+++ b/library/L1CTL_Types.ttcn
@@ -83,8 +83,6 @@
 		L1CTL_RES_T_SCHED
 	} with { variant "FIELDLENGTH(8)" };
 
-	const integer TRAFFIC_DATA_LEN := 40;
-
 	type record L1ctlHdrFlags {
 		BIT7	padding,
 		boolean f_done
@@ -299,7 +297,7 @@
 
 
 	type record L1ctlTrafficReq {
-		octetstring	data length(TRAFFIC_DATA_LEN)
+		octetstring	data
 	} with {
 		variant (data) "BYTEORDER(first)"
 	}