diff --git a/content/newtab_background_color.css b/content/newtab_background_color.css
index 54e65d2..18a1554 100644
--- a/content/newtab_background_color.css
+++ b/content/newtab_background_color.css
@@ -6,7 +6,7 @@ See the above repository for updates as well as full license text. */
 @-moz-document url("about:home"),url("about:blank"),url("about:newtab"),url("about:privatebrowsing"){
   body{background-color: rgb(46,54,69) !important;}
 }
-@-moz-document("about:privatebrowsing"){
+@-moz-document url("about:privatebrowsing"){
   .search-handoff-button{ background-color: rgba(100,100,100,0.1) !important; }
   .fake-textbox{ color: rgb(200,200,200) !important } 
 }
\ No newline at end of file