diff --git a/src/mgl/dc.cpp b/src/mgl/dc.cpp
index babad279d2..452ded710b 100644
--- a/src/mgl/dc.cpp
+++ b/src/mgl/dc.cpp
@@ -322,7 +322,7 @@ void wxDC::Clear()
         SetBrush(m_backgroundBrush);
         SelectBrush();
         GetSize(&w, &h);
-        m_MGLDC->fillRect(0, 0, w-1, h-1);
+        m_MGLDC->fillRect(0, 0, w, h);
         SetBrush(oldb);
     }
 }