diff --git a/tag_database b/tag_database
index 1e21a4c20..f80455966 100644
--- a/tag_database
+++ b/tag_database
@@ -23,4 +23,4 @@ is_lower_case:string
 count_by:list
 difference_by:list
 insertion_sort:list
-bubble_sort: list
+bubble_sort:list