diff --git a/src/generic/logg.cpp b/src/generic/logg.cpp
index bf9af38c48..9164360cec 100644
--- a/src/generic/logg.cpp
+++ b/src/generic/logg.cpp
@@ -45,6 +45,11 @@
 #include "wx/file.h"
 #include "wx/textfile.h"
 
+#ifdef  __WXMSW__
+  // for OutputDebugString()
+  #include  "wx/msw/private.h"
+#endif // Windows
+
 // ----------------------------------------------------------------------------
 // global variables
 // ----------------------------------------------------------------------------