diff --git a/library/SIP_Templates.ttcn b/library/SIP_Templates.ttcn
index 9f45b9f..f251767 100644
--- a/library/SIP_Templates.ttcn
+++ b/library/SIP_Templates.ttcn
@@ -226,6 +226,10 @@
 	fieldName := EXPIRES_E,
 	deltaSec := deltaSec
 }
+template (present) Expires tr_Expires(template (present) DeltaSec deltaSec := ?) := {
+	fieldName := EXPIRES_E,
+	deltaSec := deltaSec
+}
 
 // [20.20]
 template (value) From ts_From(template (value) Addr_Union addressField,
@@ -911,6 +915,7 @@
 		charstring reason,
 		Via via,
 		template (omit) Allow allow := omit,
+		template (omit) Contact contact := omit,
 		template (omit) P_Associated_Uri p_associated_uri := omit,
 		template (omit) Require require := omit,
 		template (omit) Server server := omit,
@@ -918,7 +923,7 @@
 		template (omit) UserAgent userAgent := omit,
 		template (omit) charstring body := omit) := {
 	statusLine := ts_SIP_StatusLine(status_code, reason),
-	msgHeader := ts_SIP_msgh_std(call_id, from_addr, to_addr, omit, method, seq_nr,
+	msgHeader := ts_SIP_msgh_std(call_id, from_addr, to_addr, contact, method, seq_nr,
 				     via,
 				     content_length := f_ContentLength(body),
 				     content_type := f_ContentTypeOrOmit(ts_CT_SDP, body),