diff --git a/.rubocop.yml b/.rubocop.yml
index c80c9bf907a..46634eb2337 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -17,7 +17,7 @@ Style/AlignArray:
                  Align the elements of an array literal if they span more than
                  one line.
   StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#align-multiline-arrays'
-  Enabled: false
+  Enabled: true
 
 Style/AlignHash:
   Description: >-
diff --git a/lib/gitlab/diff/parser.rb b/lib/gitlab/diff/parser.rb
index f7c1f20d762..0242e09a515 100644
--- a/lib/gitlab/diff/parser.rb
+++ b/lib/gitlab/diff/parser.rb
@@ -4,7 +4,7 @@ module Gitlab
       include Enumerable
 
       def parse(lines)
-        @lines = lines,
+        @lines = lines
         lines_obj = []
         line_obj_index = 0
         line_old = 1