diff --git a/tools/backfillsizes.py b/tools/backfillsizes.py
index 188ad95d5..2f60cd374 100644
--- a/tools/backfillsizes.py
+++ b/tools/backfillsizes.py
@@ -10,7 +10,8 @@ for image in Image.select():
     image_path = store.image_layer_path(image.repository.namespace,
                                         image.repository.name,
                                         image.docker_image_id)
-    size = store.get_size(image_path)
-    print 'Setting image %s size to: %s' % (image.docker_image_id, size)
-    image.image_size = size
-    image.save()
\ No newline at end of file
+    if store.exists(image_path):
+      size = store.get_size(image_path)
+      print 'Setting image %s size to: %s' % (image.docker_image_id, size)
+      image.image_size = size
+      image.save()
\ No newline at end of file