diff --git a/tpl/default/includes.html b/tpl/default/includes.html
index 6c30d1bf..d3d3c86f 100644
--- a/tpl/default/includes.html
+++ b/tpl/default/includes.html
@@ -22,7 +22,7 @@
   <meta property="og:url" content="{$index_url}?{$link.shorturl}" />
   {$ogDescription=isset($link.description_src) ? $link.description_src : $link.description}
   <meta property="og:description" content="{function="substr(strip_tags($ogDescription), 0, 300)"}" />
-  {if="$link.thumbnail"}
+  {if="!empty($link.thumbnail)"}
     <meta property="og:image" content="{$index_url}{$link.thumbnail}" />
   {/if}
   {if="!$hide_timestamps || $is_logged_in"}
diff --git a/tpl/vintage/includes.html b/tpl/vintage/includes.html
index 2efb6b10..0cabc985 100644
--- a/tpl/vintage/includes.html
+++ b/tpl/vintage/includes.html
@@ -19,7 +19,7 @@
   <meta property="og:url" content="{$index_url}?{$link.shorturl}" />
   {$ogDescription=isset($link.description_src) ? $link.description_src : $link.description}
   <meta property="og:description" content="{function="mb_substr(strip_tags($ogDescription), 0, 300)"}" />
-  {if="$link.thumbnail"}
+  {if="!empty($link.thumbnail)"}
     <meta property="og:image" content="{$index_url}{$link.thumbnail}" />
   {/if}
   {if="!$hide_timestamps || $is_logged_in"}