diff --git a/win/rfb_win32/TsSessions.cxx b/win/rfb_win32/TsSessions.cxx
index a4fac2f..b02f619 100644
--- a/win/rfb_win32/TsSessions.cxx
+++ b/win/rfb_win32/TsSessions.cxx
@@ -77,7 +77,7 @@
 
     // Try to reconnect our session to the console
     ConsoleSessionId console;
-    vlog.info("Console session is %d", console.id);
+    vlog.info("Console session is %lu", console.id);
     if (!(*_WinStationConnect)(0, sessionId, console.id, L"", 0))
       throw rdr::SystemException("Unable to connect session to Console", GetLastError());