diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 265bcb04d..76389e563 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1408,7 +1408,6 @@ Style/UnlessElse:
     - 'app/controllers/trackers_controller.rb'
     - 'lib/redmine/scm/adapters/abstract_adapter.rb'
     - 'lib/redmine/unified_diff.rb'
-    - 'lib/redmine/wiki_formatting/textile/redcloth3.rb'
 
 # Cop supports --auto-correct.
 Style/UnneededCondition:
diff --git a/lib/redmine/wiki_formatting/textile/redcloth3.rb b/lib/redmine/wiki_formatting/textile/redcloth3.rb
index 786db052f..5d7ac768b 100644
--- a/lib/redmine/wiki_formatting/textile/redcloth3.rb
+++ b/lib/redmine/wiki_formatting/textile/redcloth3.rb
@@ -575,7 +575,7 @@ class RedCloth3 < String
                             lines[line_id - 1] << '</li>'
                         end
                     end
-                    unless depth.last == tl
+                    if depth.last != tl
                         depth << tl
                         atts = pba( atts )
                         atts = shelve( atts ) if atts
@@ -584,7 +584,6 @@ class RedCloth3 < String
                         lines[line_id] = +"\t\t<li>#{content}"
                     end
                     last_line = line_id
-
                 else
                     last_line = line_id
                 end