diff --git a/src/mac/carbon/dialog.cpp b/src/mac/carbon/dialog.cpp
index 1537065f54..8a066964ca 100644
--- a/src/mac/carbon/dialog.cpp
+++ b/src/mac/carbon/dialog.cpp
@@ -66,7 +66,7 @@ bool wxDialog::Create(wxWindow *parent, wxWindowID id,
 
 	MacCreateRealWindow( title , pos , size , MacRemoveBordersFromStyle(style)  , name ) ;
 
-	m_macWindowData->m_macWindowBackgroundTheme = kThemeBrushDialogBackgroundActive ;
+	m_macWindowBackgroundTheme = kThemeBrushDialogBackgroundActive ;
   return TRUE;
 }
 
diff --git a/src/mac/carbon/frame.cpp b/src/mac/carbon/frame.cpp
index 81f6b40bee..adc15790af 100644
--- a/src/mac/carbon/frame.cpp
+++ b/src/mac/carbon/frame.cpp
@@ -108,7 +108,7 @@ bool wxFrame::Create(wxWindow *parent,
 
   MacCreateRealWindow( title, pos , size , MacRemoveBordersFromStyle(style) , name ) ;
   
-	m_macWindowData->m_macWindowBackgroundTheme = kThemeBrushDocumentWindowBackground ;
+	m_macWindowBackgroundTheme = kThemeBrushDocumentWindowBackground ;
 
   wxModelessWindows.Append(this);
 
diff --git a/src/mac/carbon/mdi.cpp b/src/mac/carbon/mdi.cpp
index f0d2f53138..b41f8735e8 100644
--- a/src/mac/carbon/mdi.cpp
+++ b/src/mac/carbon/mdi.cpp
@@ -242,7 +242,7 @@ bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 
   	MacCreateRealWindow( title, pos , size , MacRemoveBordersFromStyle(style) , name ) ;
   
-	m_macWindowData->m_macWindowBackgroundTheme = kThemeBrushDocumentWindowBackground ;
+	  m_macWindowBackgroundTheme = kThemeBrushDocumentWindowBackground ;
 
     wxModelessWindows.Append(this);
     return FALSE;
diff --git a/src/mac/dialog.cpp b/src/mac/dialog.cpp
index 1537065f54..8a066964ca 100644
--- a/src/mac/dialog.cpp
+++ b/src/mac/dialog.cpp
@@ -66,7 +66,7 @@ bool wxDialog::Create(wxWindow *parent, wxWindowID id,
 
 	MacCreateRealWindow( title , pos , size , MacRemoveBordersFromStyle(style)  , name ) ;
 
-	m_macWindowData->m_macWindowBackgroundTheme = kThemeBrushDialogBackgroundActive ;
+	m_macWindowBackgroundTheme = kThemeBrushDialogBackgroundActive ;
   return TRUE;
 }
 
diff --git a/src/mac/frame.cpp b/src/mac/frame.cpp
index 81f6b40bee..adc15790af 100644
--- a/src/mac/frame.cpp
+++ b/src/mac/frame.cpp
@@ -108,7 +108,7 @@ bool wxFrame::Create(wxWindow *parent,
 
   MacCreateRealWindow( title, pos , size , MacRemoveBordersFromStyle(style) , name ) ;
   
-	m_macWindowData->m_macWindowBackgroundTheme = kThemeBrushDocumentWindowBackground ;
+	m_macWindowBackgroundTheme = kThemeBrushDocumentWindowBackground ;
 
   wxModelessWindows.Append(this);
 
diff --git a/src/mac/mdi.cpp b/src/mac/mdi.cpp
index f0d2f53138..b41f8735e8 100644
--- a/src/mac/mdi.cpp
+++ b/src/mac/mdi.cpp
@@ -242,7 +242,7 @@ bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 
   	MacCreateRealWindow( title, pos , size , MacRemoveBordersFromStyle(style) , name ) ;
   
-	m_macWindowData->m_macWindowBackgroundTheme = kThemeBrushDocumentWindowBackground ;
+	  m_macWindowBackgroundTheme = kThemeBrushDocumentWindowBackground ;
 
     wxModelessWindows.Append(this);
     return FALSE;