Index: main/pbx.c
===================================================================
--- main/pbx.c	(revision 75350)
+++ main/pbx.c	(working copy)
@@ -2401,7 +2401,9 @@
 					dst_exten[pos] = '\0';
 					break;
 				}
-				if (res == AST_PBX_KEEPALIVE) {
+				if (res == -1) {
+					ast_softhangup(c, c->hangupcause ? c->hangupcause : AST_CAUSE_NORMAL_CLEARING);
+				} else if (res == AST_PBX_KEEPALIVE) {
 					ast_debug(1, "Spawn extension (%s,%s,%d) exited KEEPALIVE on '%s'\n", c->context, c->exten, c->priority, c->name);
 					if (option_verbose > 1)
 						ast_verbose( VERBOSE_PREFIX_2 "Spawn extension (%s, %s, %d) exited KEEPALIVE on '%s'\n", c->context, c->exten, c->priority, c->name);