diff --git a/lib/pico.php b/lib/pico.php
index d2230bd..8e415ac 100644
--- a/lib/pico.php
+++ b/lib/pico.php
@@ -163,7 +163,7 @@ class Pico {
 			}
 		}
 		
-		if($headers['date']) $headers['date_formatted'] = date($config['date_format'], strtotime($headers['date']));
+		if(isset($headers['date'])) $headers['date_formatted'] = date($config['date_format'], strtotime($headers['date']));
 
 		return $headers;
 	}