diff --git a/glance/image_cache/prefetcher.py b/glance/image_cache/prefetcher.py
index dbce857ed7..9b94ec9b1f 100644
--- a/glance/image_cache/prefetcher.py
+++ b/glance/image_cache/prefetcher.py
@@ -56,10 +56,10 @@ class Prefetcher(object):
             logger.warn(_("No metadata found for image '%s'"), image_id)
             return False
 
-        chunks = get_from_backend(image_meta['location'],
-                                  options=self.options)
+        image_data, image_size = get_from_backend(
+                image_meta['location'], options=self.options)
         logger.debug(_("Caching image '%s'"), image_id)
-        self.cache.cache_image_iter(image_id, chunks)
+        self.cache.cache_image_iter(image_id, image_data)
         return True
 
     def run(self):