Index: channels/chan_skinny.c
===================================================================
--- channels/chan_skinny.c	(revision 57915)
+++ channels/chan_skinny.c	(working copy)
@@ -1425,6 +1425,11 @@
 	if (skinnydebug)
 		ast_log(LOG_VERBOSE, "writing packet type %04X (%d bytes) to socket %d\n", letohl(req->e), letohl(req->len)+8, s->fd);
 
+	if (!s) {
+		ast_log(LOG_WARNING, "transmit_response: no session\n");
+		return -1;
+	}
+
 	if (letohl(req->len > SKINNY_MAX_PACKET) || letohl(req->len < 0)) {
 		ast_log(LOG_WARNING, "transmit_response: the length of the request is out of bounds\n");
 		return -1;