diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index 3efb6c827..ceba1187a 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -1295,7 +1295,7 @@ div.wiki img {vertical-align:middle; max-width:100%;}
   vertical-align: middle;
 }
 .icon-only::after {
-  content: " ";
+  content: "\a0";
 }
 
 .icon-add { background-image: url(../images/add.png); }