diff --git a/src/msw/bitmap.cpp b/src/msw/bitmap.cpp
index dbb6114bee..8be40253f6 100644
--- a/src/msw/bitmap.cpp
+++ b/src/msw/bitmap.cpp
@@ -1865,6 +1865,7 @@ HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
     }
 
     ICONINFO iconInfo;
+    wxZeroMemory(iconInfo);
     iconInfo.fIcon = iconWanted;  // do we want an icon or a cursor?
     if ( !iconWanted )
     {