diff --git a/client/html/post_content.tpl b/client/html/post_content.tpl
index f74a3bb0..aaecdf24 100644
--- a/client/html/post_content.tpl
+++ b/client/html/post_content.tpl
@@ -1,4 +1,4 @@
-<div class='post-content post-type-<%- ctx.post.type %>'<% if (ctx.post.type === 'flash') { %> style='background-image: url(<%- ctx.post.thumbnailUrl %>)'<% } %>>
+<div class='post-content post-type-<%- ctx.post.type %>' style='<%- ctx.post.type === 'flash' ? 'background-image: url('+ctx.post.thumbnailUrl+')' : '' %>'>
     <% if (['image', 'animation'].includes(ctx.post.type)) { %>
 
         <img class='resize-listener' alt='' src='<%- ctx.post.contentUrl %>'/>