diff --git a/chaco/polygon_plot.py b/chaco/polygon_plot.py
index 864d964c9..e523f33ad 100644
--- a/chaco/polygon_plot.py
+++ b/chaco/polygon_plot.py
@@ -51,15 +51,15 @@ class PolygonPlot(BaseXYPlot):
 
     # Override the hittest_type trait inherited from BaseXYPlot
     hittest_type = Enum("poly", "point", "line")
-    
+
     # The RGBA tuple for rendering edges.  It is always a tuple of length 4.
     # It has the same RGB values as edge_color_, and its alpha value is the
-    # alpha value of self.edge_color multiplied by self.alpha. 
+    # alpha value of self.edge_color multiplied by self.alpha.
     effective_edge_color = Property(Tuple, depends_on=['edge_color', 'alpha'])
-    
+
     # The RGBA tuple for rendering the face.  It is always a tuple of length 4.
     # It has the same RGB values as face_color_, and its alpha value is the
-    # alpha value of self.face_color multiplied by self.alpha.   
+    # alpha value of self.face_color multiplied by self.alpha.
     effective_face_color = Property(Tuple, depends_on=['face_color', 'alpha'])
 
     #----------------------------------------------------------------------
diff --git a/chaco/tools/better_selecting_zoom.py b/chaco/tools/better_selecting_zoom.py
index 1153d7fee..52871da91 100644
--- a/chaco/tools/better_selecting_zoom.py
+++ b/chaco/tools/better_selecting_zoom.py
@@ -327,7 +327,6 @@ def _end_select(self, event):
         """ Ends selection of the zoom region, adds the new zoom range to
         the zoom stack, and does the zoom.
         """
-        self._screen_end = (event.x, event.y)
 
         start = numpy.array(self._screen_start)
         end = numpy.array(self._screen_end)