diff --git a/data/model/repository.py b/data/model/repository.py
index 937e51a52..24199c00b 100644
--- a/data/model/repository.py
+++ b/data/model/repository.py
@@ -119,17 +119,17 @@ def garbage_collect_repo(repo):
                      .join(RepositoryTag)
                      .where(Image.repository == repo))
 
-    referenced_anscestors = set()
+    referenced_ancestors = set()
     for tagged_image in tagged_images:
-      # The anscestor list is in the format '/1/2/3/', extract just the ids
-      anscestor_id_strings = tagged_image.ancestors.split('/')[1:-1]
-      ancestor_list = [int(img_id_str) for img_id_str in anscestor_id_strings]
-      referenced_anscestors = referenced_anscestors.union(set(ancestor_list))
-      referenced_anscestors.add(tagged_image.id)
+      # The ancestor list is in the format '/1/2/3/', extract just the ids
+      ancestor_id_strings = tagged_image.ancestors.split('/')[1:-1]
+      ancestor_list = [int(img_id_str) for img_id_str in ancestor_id_strings]
+      referenced_ancestors = referenced_ancestors.union(set(ancestor_list))
+      referenced_ancestors.add(tagged_image.id)
 
     all_repo_images = Image.select(Image.id, Image.storage).where(Image.repository == repo)
     all_images = {int(img.id): img for img in all_repo_images}
-    to_remove = set(all_images.keys()).difference(referenced_anscestors)
+    to_remove = set(all_images.keys()).difference(referenced_ancestors)
 
     if len(to_remove) > 0:
       logger.info('Cleaning up unreferenced images: %s', to_remove)