diff --git a/include/wx/cocoa/statbox.h b/include/wx/cocoa/statbox.h
index 1767590425..2ebb3c79d6 100644
--- a/include/wx/cocoa/statbox.h
+++ b/include/wx/cocoa/statbox.h
@@ -54,6 +54,8 @@ protected:
 // Implementation
 // ------------------------------------------------------------------------
 public:
+    void GetBordersForSizer(int *borderTop, int *borderOther) const;
+protected:
 };
 
 #endif // __WX_COCOA_STATBOX_H__
diff --git a/src/cocoa/statbox.mm b/src/cocoa/statbox.mm
index 33320f707c..23dd3261d6 100644
--- a/src/cocoa/statbox.mm
+++ b/src/cocoa/statbox.mm
@@ -43,3 +43,17 @@ wxStaticBox::~wxStaticBox()
     SetNSBox(NULL);
 }
 
+void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const
+{
+    NSRect contentRect = [[GetNSBox() contentView] frame];
+    NSRect thisRect = [m_cocoaNSView frame];
+    *borderTop = thisRect.size.height - (contentRect.origin.y+contentRect.size.height);
+    *borderOther = thisRect.size.width - (contentRect.origin.x+contentRect.size.width);
+    int nextBorder = contentRect.origin.y;
+    if(nextBorder > *borderOther)
+        *borderOther = nextBorder;
+    nextBorder = contentRect.origin.x;
+    if(nextBorder > *borderOther)
+        *borderOther = nextBorder;
+}
+