diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 30201274a..ade1efe0b 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -69,7 +69,6 @@ Layout/CaseIndentation:
   Exclude:
     - 'app/models/issue_query.rb'
     - 'config/initializers/10-patches.rb'
-    - 'lib/redmine/helpers/gantt.rb'
 
 # Cop supports --auto-correct.
 Layout/ClosingHeredocIndentation:
diff --git a/lib/redmine/helpers/gantt.rb b/lib/redmine/helpers/gantt.rb
index ef9475cea..2258faf9c 100644
--- a/lib/redmine/helpers/gantt.rb
+++ b/lib/redmine/helpers/gantt.rb
@@ -820,8 +820,8 @@ module Redmine
         output = +''
         data_options = {}
         data_options[:collapse_expand] = "#{object.class}-#{object.id}".downcase if object
-
-        css = "task " + case object
+        css = "task " +
+          case object
           when Project
             "project"
           when Version
@@ -831,7 +831,6 @@ module Redmine
           else
             ""
           end
-
         # Renders the task bar, with progress and late
         if coords[:bar_start] && coords[:bar_end]
           width = coords[:bar_end] - coords[:bar_start] - 2