diff --git a/sysinfo/GSM_Types.ttcn b/sysinfo/GSM_Types.ttcn
index 4529371..c205140 100644
--- a/sysinfo/GSM_Types.ttcn
+++ b/sysinfo/GSM_Types.ttcn
@@ -577,8 +577,11 @@
 		sapi := sapi
 	};
 
-	template RslLinkId ts_RslLinkID_SACCH(template GsmSapi sapi) modifies tr_RslLinkID_SACCH := {
-		prio := SAPI0_PRIO_NORMAL
+	template RslLinkId ts_RslLinkID_SACCH(GsmSapi sapi) := {
+		c := SACCH,
+		na := false,
+		prio := SAPI0_PRIO_NORMAL,
+		sapi := sapi
 	};
 
 } with { encode "RAW"; variant "FIELDORDER(msb)" }