diff --git a/src/gtk/dc.cpp b/src/gtk/dc.cpp
index 917a98acaa..0c4349834c 100644
--- a/src/gtk/dc.cpp
+++ b/src/gtk/dc.cpp
@@ -619,7 +619,7 @@ void wxGTKDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCo
     wxASSERT_MSG( width >= 0 && height >= 0,
                   "Clipping box size values cannot be negative" );
 
-    wxRect newRegion(x, y, width, height);
+    wxRect newRegion(LogicalToDevice(x, y), LogicalToDeviceRel(width, height));
 
     wxRect clipRegion;
     if ( m_clipping )
@@ -635,8 +635,7 @@ void wxGTKDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCo
         // of required clipping box and DC surface.
         int dcWidth, dcHeight;
         DoGetSize(&dcWidth, &dcHeight);
-        wxRect dcRect(DeviceToLogicalX(0), DeviceToLogicalY(0),
-                      DeviceToLogicalXRel(dcWidth), DeviceToLogicalYRel(dcHeight));
+        wxRect dcRect(0, 0, dcWidth, dcHeight);
         clipRegion = dcRect.Intersect(newRegion);
 
         m_clipping = true;
diff --git a/src/gtk/dcclient.cpp b/src/gtk/dcclient.cpp
index fed357b468..7592de0d06 100644
--- a/src/gtk/dcclient.cpp
+++ b/src/gtk/dcclient.cpp
@@ -1919,10 +1919,10 @@ void wxWindowDCImpl::UpdateClipBox()
     }
     else
     {
-        m_clipX1 = DeviceToLogicalX(r.GetLeft());
-        m_clipY1 = DeviceToLogicalY(r.GetTop());
-        m_clipX2 = m_clipX1 + DeviceToLogicalXRel(r.GetWidth());
-        m_clipY2 = m_clipY1 + DeviceToLogicalYRel(r.GetHeight());
+        m_clipX1 = r.GetLeft();
+        m_clipY1 = r.GetTop();
+        m_clipX2 = r.GetRight() + 1;
+        m_clipY2 = r.GetBottom() + 1;
     }
     m_isClipBoxValid = true;
 }