diff --git a/infolog/inc/class.infolog_bo.inc.php b/infolog/inc/class.infolog_bo.inc.php
index 461b7b32ae..02b5426d64 100644
--- a/infolog/inc/class.infolog_bo.inc.php
+++ b/infolog/inc/class.infolog_bo.inc.php
@@ -964,6 +964,10 @@ class infolog_bo
 			}
 			
 			// create (and remove) links in custom fields
+			if(!is_array($old))
+			{
+				$old = array();
+			}
 			Api\Storage\Customfields::update_links('infolog',$values,$old,'info_id');
 
 			// Check for restore of deleted entry, restore held links