diff --git a/include/wx/dataview.h b/include/wx/dataview.h
index f185c94c93..7928171e71 100644
--- a/include/wx/dataview.h
+++ b/include/wx/dataview.h
@@ -478,6 +478,7 @@ public:
         : m_text(text), m_icon(icon)
     { }
     wxDataViewIconText( const wxDataViewIconText &other )
+        : wxObject()
     { m_icon = other.m_icon; m_text = other.m_text; }
 
     void SetText( const wxString &text ) { m_text = text; }
diff --git a/src/msw/palette.cpp b/src/msw/palette.cpp
index 570f4d96c8..800db50b2c 100644
--- a/src/msw/palette.cpp
+++ b/src/msw/palette.cpp
@@ -55,6 +55,7 @@ public:
     }
 
     wxPaletteRefData(const wxPaletteRefData& data)
+        : wxGDIRefData()
     {
         Init();