diff --git a/library/PCUIF_Types.ttcn b/library/PCUIF_Types.ttcn
index 83e32fc..b744ebc 100644
--- a/library/PCUIF_Types.ttcn
+++ b/library/PCUIF_Types.ttcn
@@ -468,7 +468,7 @@
 			len := ?,
 			data := data,
 			fn := fn,
-			arfcn := 0, /* unused in BTS */
+			arfcn := ?, /* unused in BTS */
 			trx_nr := trx_nr,
 			ts_nr := ts_nr,
 			block_nr := block_nr,