diff --git a/library/GSM_RR_Types.ttcn b/library/GSM_RR_Types.ttcn
index 2ad3b6a..59fe6d5 100644
--- a/library/GSM_RR_Types.ttcn
+++ b/library/GSM_RR_Types.ttcn
@@ -1120,6 +1120,15 @@
 		arfcn := arfcn,
 		maio_hsn := omit
 	}
+	template ChannelDescription tr_ChanDescH0(template (present) RslChannelNr chan_nr := ?,
+						  template (present) uint12_t arfcn := ?,
+						  template (present) uint3_t tsc := ?) := {
+		chan_nr := chan_nr,
+		tsc := tsc,
+		h := false,
+		arfcn := arfcn,
+		maio_hsn := omit
+	}
 
 	template (value) ChannelDescription ts_ChanDescH1(template (value) RslChannelNr chan_nr,
 							  template (value) MaioHsn maio_hsn,
@@ -1130,6 +1139,15 @@
 		arfcn := omit,
 		maio_hsn := maio_hsn
 	}
+	template ChannelDescription tr_ChanDescH1(template (present) RslChannelNr chan_nr := ?,
+						  template (present) MaioHsn maio_hsn := ?,
+						  template (present) uint3_t tsc := ?) := {
+		chan_nr := chan_nr,
+		tsc := tsc,
+		h := true,
+		arfcn := omit,
+		maio_hsn := maio_hsn
+	}
 
 
 	/* Templates for the RR Channel Release message's "Cell selection indicator after release of all TCH and SDCCH" IE.