diff --git a/win/rfb_win32/MsgWindow.cxx b/win/rfb_win32/MsgWindow.cxx
index 306b1c3..1f2299e 100644
--- a/win/rfb_win32/MsgWindow.cxx
+++ b/win/rfb_win32/MsgWindow.cxx
@@ -43,7 +43,7 @@
 };
 
 LRESULT CALLBACK MsgWindowProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam) {
-  LRESULT result;
+  LRESULT result = 0;
 
   if (msg == WM_CREATE)
     SetWindowLong(wnd, GWL_USERDATA, (long)((CREATESTRUCT*)lParam)->lpCreateParams);