diff --git a/include/wx/msw/private.h b/include/wx/msw/private.h
index 309f4376de..e824c6e5fd 100644
--- a/include/wx/msw/private.h
+++ b/include/wx/msw/private.h
@@ -454,7 +454,7 @@ private:
     void DoInit(HGDIOBJ hgdiobj) { m_hgdiobj = ::SelectObject(m_hdc, hgdiobj); }
 
 public:
-    SelectInHDC() : m_hdc(NULL) { }
+    SelectInHDC() : m_hdc(NULL), m_hgdiobj(NULL) { }
     SelectInHDC(HDC hdc, HGDIOBJ hgdiobj) : m_hdc(hdc) { DoInit(hgdiobj); }
 
     void Init(HDC hdc, HGDIOBJ hgdiobj)