diff --git a/win/rfb_win32/MsgWindow.cxx b/win/rfb_win32/MsgWindow.cxx
index 4c50c2f..1d58561 100644
--- a/win/rfb_win32/MsgWindow.cxx
+++ b/win/rfb_win32/MsgWindow.cxx
@@ -52,7 +52,7 @@
     SetWindowLongPtr(wnd, GWLP_USERDATA, 0);
   MsgWindow* _this = (MsgWindow*) GetWindowLongPtr(wnd, GWLP_USERDATA);
   if (!_this) {
-    vlog.info("null _this in %x, message %x", wnd, msg);
+    vlog.info("null _this in %p, message %x", wnd, msg);
     return SafeDefWindowProc(wnd, msg, wParam, lParam);
   }
 
@@ -102,13 +102,13 @@
   if (!handle) {
     throw rdr::SystemException("unable to create WMNotifier window instance", GetLastError());
   }
-  vlog.debug("created window \"%s\" (%x)", (const char*)CStr(name.buf), handle);
+  vlog.debug("created window \"%s\" (%p)", (const char*)CStr(name.buf), handle);
 }
 
 MsgWindow::~MsgWindow() {
   if (handle)
     DestroyWindow(handle);
-  vlog.debug("destroyed window \"%s\" (%x)", (const char*)CStr(name.buf), handle); 
+  vlog.debug("destroyed window \"%s\" (%p)", (const char*)CStr(name.buf), handle);
 }
 
 LRESULT