diff --git a/lib/matplotlib/table.py b/lib/matplotlib/table.py
index 9ae70c1c6fe4..aabec96fc8dd 100644
--- a/lib/matplotlib/table.py
+++ b/lib/matplotlib/table.py
@@ -279,7 +279,8 @@ def get_children(self):
 
     def get_window_extent(self, renderer):
         'Return the bounding box of the table in window coords'
-        boxes = [c.get_window_extent(renderer) for c in self._cells]
+        boxes = [self._cells[c].get_window_extent(renderer)
+                 for c in self._cells.keys()]
         return Bbox.union(boxes)
 
     def _do_cell_alignment(self):