diff --git a/lib/redmine/scm/adapters/mercurial_adapter.rb b/lib/redmine/scm/adapters/mercurial_adapter.rb
index 80ad02f58..1f706946f 100644
--- a/lib/redmine/scm/adapters/mercurial_adapter.rb
+++ b/lib/redmine/scm/adapters/mercurial_adapter.rb
@@ -113,13 +113,11 @@ module Redmine
           return @summary if @summary 
           doc = nil
           hg 'rhsummary' do |io|
-            output = io.read
             begin
-              doc = ActiveSupport::XmlMini.parse(output)['rhsummary']
+              @summary = ActiveSupport::XmlMini.parse(io.read)['rhsummary']
             rescue
             end
           end
-          @summary = doc
         end
         private :summary