diff --git a/src/msw/region.cpp b/src/msw/region.cpp
index 0e1cab3ea9..d2b0f83cf6 100644
--- a/src/msw/region.cpp
+++ b/src/msw/region.cpp
@@ -101,7 +101,7 @@ wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight)
 wxRegion::wxRegion(const wxRect& rect)
 {
     m_refData = new wxRegionRefData;
-    M_REGION = ::CreateRectRgn(rect.GetLeft(), rect.GetTop(), rect.GetRight(), rect.GetBottom());
+    M_REGION = ::CreateRectRgn(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height);
 }
 
 /*