diff --git a/app/helpers/diff_helper.rb b/app/helpers/diff_helper.rb
index 5c7317bdd4..d78b0b5a15 100644
--- a/app/helpers/diff_helper.rb
+++ b/app/helpers/diff_helper.rb
@@ -150,6 +150,6 @@ module DiffHelper
   end
 
   def toggle_whitespace_link(url)
-    link_to "#{hide_whitespace? ? 'Show' : 'Hide'} whitespace changes", url, class: 'btn btn-default'
+    link_to "#{hide_whitespace? ? 'Show' : 'Hide'} whitespace changes", url, class: 'btn btn-default hidden-xs'
   end
 end