diff --git a/src/mac/carbon/dc.cpp b/src/mac/carbon/dc.cpp
index c0f44cf484..8011e7da3f 100644
--- a/src/mac/carbon/dc.cpp
+++ b/src/mac/carbon/dc.cpp
@@ -631,10 +631,9 @@ void wxDC::ComputeScaleAndOrigin()
     {
         // this is a bit artificial, but we need to force wxDC to think
         // the pen has changed
-        wxPen* pen = & GetPen();
-        wxPen tempPen;
-        m_pen = tempPen;
-        SetPen(* pen);
+        wxPen pen(GetPen());
+        m_pen = wxNullPen;
+        SetPen(pen);
     }
 }