diff --git a/tpl/default/includes.html b/tpl/default/includes.html
index d3d3c86f..428b8ee2 100644
--- a/tpl/default/includes.html
+++ b/tpl/default/includes.html
@@ -27,7 +27,7 @@
   {/if}
   {if="!$hide_timestamps || $is_logged_in"}
     <meta property="article:published_time" content="{$link.created->format(DateTime::ATOM)}" />
-    {if="$link.updated"}
+    {if="!empty($link.updated)"}
       <meta property="article:modified_time" content="{$link.updated->format(DateTime::ATOM)}" />
     {/if}
   {/if}
diff --git a/tpl/vintage/includes.html b/tpl/vintage/includes.html
index 0cabc985..1c4ff79c 100644
--- a/tpl/vintage/includes.html
+++ b/tpl/vintage/includes.html
@@ -24,7 +24,7 @@
   {/if}
   {if="!$hide_timestamps || $is_logged_in"}
     <meta property="article:published_time" content="{$link.created->format(DateTime::ATOM)}" />
-    {if="$link.updated"}
+    {if="!empty($link.updated)"}
       <meta property="article:modified_time" content="{$link.updated->format(DateTime::ATOM)}" />
     {/if}
   {/if}