diff --git a/app/assets/javascripts/defer/html-sanitizer-bundle.js b/app/assets/javascripts/defer/html-sanitizer-bundle.js
index ff1973c62b8..60524c8d932 100644
--- a/app/assets/javascripts/defer/html-sanitizer-bundle.js
+++ b/app/assets/javascripts/defer/html-sanitizer-bundle.js
@@ -1054,7 +1054,6 @@ html4.ELEMENTS = {
   'button': 0,
   'canvas': 0,
   'caption': 0,
-  'center': 0,
   'cite': 0,
   'code': 0,
   'col': 2,
@@ -1178,7 +1177,6 @@ html4.ELEMENT_DOM_INTERFACES = {
   'button': 'HTMLButtonElement',
   'canvas': 'HTMLCanvasElement',
   'caption': 'HTMLTableCaptionElement',
-  'center': 'HTMLElement',
   'cite': 'HTMLElement',
   'code': 'HTMLElement',
   'col': 'HTMLTableColElement',
diff --git a/test/javascripts/lib/markdown_test.js b/test/javascripts/lib/markdown_test.js
index a3e3d0499af..c4a1f0ae652 100644
--- a/test/javascripts/lib/markdown_test.js
+++ b/test/javascripts/lib/markdown_test.js
@@ -329,6 +329,7 @@ test("sanitize", function() {
          "<p><a href=\"http://disneyland.disney.go.com/\">disney</a> <a href=\"http://reddit.com\">reddit</a></p>",
          "we can embed proper links");
 
+  cooked("<center>hello</center>", "<p>hello</p>", "it does not allow centering");
   cooked("<table><tr><td>hello</td></tr></table>\nafter", "<p>after</p>", "it does not allow tables");
   cooked("<blockquote>a\n</blockquote>\n", "<blockquote>a\n\n<br/>\n\n</blockquote>", "it does not double sanitize");