diff --git a/lib/vagrant/bundler.rb b/lib/vagrant/bundler.rb
index e30a1657a..563454786 100644
--- a/lib/vagrant/bundler.rb
+++ b/lib/vagrant/bundler.rb
@@ -253,7 +253,6 @@ module Vagrant
       @logger.debug("Enabling default remote RubyGems sources")
       default_sources.each do |src|
         @logger.debug("Adding source - #{src}")
-        installer_set.prefer_sources.push(src)
         Gem.sources << src
       end
       installer_set.prefer_sources = source_list