diff --git a/addressbook/inc/class.addressbook_so.inc.php b/addressbook/inc/class.addressbook_so.inc.php
index 73f1f3e3a3..a5f1b0a0ce 100755
--- a/addressbook/inc/class.addressbook_so.inc.php
+++ b/addressbook/inc/class.addressbook_so.inc.php
@@ -793,9 +793,9 @@ class addressbook_so
 		{
 			$this->somain->delete(array('owner' => $account_id));	// so_sql_cf::delete() takes care of cfs too
 
-			if(method_exists($this->somain, 'get_lists'))
+			if (method_exists($this->somain, 'get_lists') &&
+				($lists = $this->somain->get_lists($account_id)))
 			{
-				$lists = $this->somain->get_lists($account_id);
 				$this->somain->delete_list(array_keys($lists));
 			}
 		}