--- asterisk-10.0.1/main/features.c	2011-10-20 23:58:39.000000000 +0200
+++ asterisk-10.0.0-parkfix/main/features.c	2012-01-25 16:28:17.862390636 +0100
@@ -5301,6 +5301,7 @@ static void park_add_hints(const char *c
 		snprintf(exten, sizeof(exten), "%d", numext);
 		snprintf(device, sizeof(device), "park:%s@%s", exten, context);
 		ast_add_extension(context, 1, exten, PRIORITY_HINT, NULL, NULL, device, NULL, NULL, registrar);
+		ast_devstate_changed(AST_DEVICE_NOT_INUSE, "park:%s@%s", exten, context);
 	}
 }