diff --git a/examples/client_test.cpp b/examples/client_test.cpp
index 7fc7d37a4..2b93d3988 100755
--- a/examples/client_test.cpp
+++ b/examples/client_test.cpp
@@ -53,6 +53,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/session.hpp"
 #include "libtorrent/http_settings.hpp"
 #include "libtorrent/identify_client.hpp"
+#include "libtorrent/alert_types.hpp"
 
 #ifdef WIN32