diff --git a/app/helpers/issues_helper.rb b/app/helpers/issues_helper.rb
index 9e419ab43..c6de00c10 100644
--- a/app/helpers/issues_helper.rb
+++ b/app/helpers/issues_helper.rb
@@ -75,6 +75,9 @@ module IssuesHelper
       when 'fixed_version_id'
         v = Version.find_by_id(detail.value) and value = v.name if detail.value
         v = Version.find_by_id(detail.old_value) and old_value = v.name if detail.old_value
+      when 'estimated_hours'
+        value = "%0.02f" % detail.value.to_f unless detail.value.blank?
+        old_value = "%0.02f" % detail.old_value.to_f unless detail.old_value.blank?
       end
     when 'cf'
       custom_field = CustomField.find_by_id(detail.prop_key)