diff --git a/app/assets/javascripts/merge_request.js.coffee b/app/assets/javascripts/merge_request.js.coffee
index 1f46e331427..dabfd91cf14 100644
--- a/app/assets/javascripts/merge_request.js.coffee
+++ b/app/assets/javascripts/merge_request.js.coffee
@@ -9,7 +9,7 @@ class @MergeRequest
   # Options:
   #   action - String, current controller action
   #
-  constructor: (@opts) ->
+  constructor: (@opts = {}) ->
     this.$el = $('.merge-request')
 
     this.$('.show-all-commits').on 'click', =>
diff --git a/spec/javascripts/merge_request_spec.js.coffee b/spec/javascripts/merge_request_spec.js.coffee
index 22ebc7039d1..3cb67d51c85 100644
--- a/spec/javascripts/merge_request_spec.js.coffee
+++ b/spec/javascripts/merge_request_spec.js.coffee
@@ -6,7 +6,7 @@ describe 'MergeRequest', ->
 
     beforeEach ->
       fixture.load('merge_requests_show.html')
-      @merge = new MergeRequest({})
+      @merge = new MergeRequest()
 
     it 'modifies the Markdown field', ->
       spyOn(jQuery, 'ajax').and.stub()