Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 38784)
+++ channels/chan_sip.c	(working copy)
@@ -6704,6 +6704,8 @@
 	add_header(&req, "Event", tmp);
 	if (terminate)
 		add_header(&req, "Subscription-state", "terminated;reason=noresource");
+	else
+		add_header(&req, "Subscription-state", "active");
 	add_header(&req, "Content-Type", "message/sipfrag;version=2.0");
 	add_header(&req, "Allow", ALLOWED_METHODS);
 	add_header(&req, "Supported", SUPPORTED_EXTENSIONS);