diff --git a/core/attributedef.class.inc.php b/core/attributedef.class.inc.php
index 6734c024b..411a0e778 100644
--- a/core/attributedef.class.inc.php
+++ b/core/attributedef.class.inc.php
@@ -1985,7 +1985,7 @@ class AttributeDateTime extends AttributeDBField
 		{
 			if (empty($default))
 			{
-				$default = date(self::GetDateFormat());
+				$default = date($this->GetDateFormat());
 			}
 		}