diff --git a/simgear/io/test_HTTP.hxx b/simgear/io/test_HTTP.hxx
index 028b5dfc..d3e1a395 100644
--- a/simgear/io/test_HTTP.hxx
+++ b/simgear/io/test_HTTP.hxx
@@ -201,6 +201,7 @@ public:
 
     virtual ~TestServer()
     {
+        disconnectAll();
         _poller.removeChannel(this);
     }