diff --git a/src/msw/bitmap.cpp b/src/msw/bitmap.cpp
index c789049ef3..1c3486a3e8 100644
--- a/src/msw/bitmap.cpp
+++ b/src/msw/bitmap.cpp
@@ -1352,6 +1352,7 @@ bool wxBitmap::InitFromHBITMAP(WXHBITMAP bmp, int width, int height, int depth)
     GetBitmapData()->m_width = width;
     GetBitmapData()->m_height = height;
     GetBitmapData()->m_depth = depth;
+    GetBitmapData()->m_hasAlpha = (depth == 32) && CheckAlpha(bmp);
 
     return IsOk();
 }