diff --git a/lib/redmine/plugin.rb b/lib/redmine/plugin.rb
index 7f058a31d..f95c17fa5 100644
--- a/lib/redmine/plugin.rb
+++ b/lib/redmine/plugin.rb
@@ -143,6 +143,28 @@ module Redmine #:nodoc:
     end
 
     def self.load
+      # load plugins from bundle installed gems.
+      Gem.loaded_specs.each do |gem_name, gem_spec|
+        initializer = File.join(gem_spec.full_gem_path, 'init.rb')
+        is_redmine_plugin = true # TODO: detect redmine plugin
+        if File.file?(initializer) && is_redmine_plugin
+          # TODO: Set plugin.directory to gem root.
+          require initializer
+
+          # Make pointer to reduce confusing for redmine maintainer
+          path = File.join(Redmine::Plugin.directory, gem_name)
+          if !File.exists?(path)
+            File.open(path, 'w') do |f|
+              f.write(<<EOS)
+This plugin was installed as gem wrote to Gemfile* instead of putting Redmine's plugin directory.
+See #{gem_name} gem installed directory.
+EOS
+            end
+          end
+        end
+      end
+
+      # Keep current plugin loading method.
       Dir.glob(File.join(self.directory, '*')).sort.each do |directory|
         if File.directory?(directory)
           lib = File.join(directory, "lib")