diff --git a/lib/bundler/spec_set.rb b/lib/bundler/spec_set.rb
index 1d0b7a460d..21d57fdab4 100644
--- a/lib/bundler/spec_set.rb
+++ b/lib/bundler/spec_set.rb
@@ -176,7 +176,7 @@ module Bundler
     def lookup
       @lookup ||= begin
         lookup = Hash.new {|h, k| h[k] = [] }
-        Index.sort_specs(@specs).reverse_each do |s|
+        @specs.each do |s|
           lookup[s.name] << s
         end
         lookup