diff --git a/lib/gitlab/git/index.rb b/lib/gitlab/git/index.rb
index 3d0000879f8743bc1b4603294d69c37c1d7ef827..69a7a513281c8a5f75fd20714e5997d3985ccf48 100644
--- a/lib/gitlab/git/index.rb
+++ b/lib/gitlab/git/index.rb
@@ -10,9 +10,7 @@ module Gitlab
         @raw_index = repository.rugged.index
       end
 
-      def read_tree(tree)
-        raw_index.read_tree(tree)
-      end
+      delegate :read_tree, to: :raw_index
 
       def write_tree
         raw_index.write_tree(repository.rugged)