diff --git a/htdocs/partnership/class/partnershiputils.class.php b/htdocs/partnership/class/partnershiputils.class.php
index 8248860f83b..4194b117698 100644
--- a/htdocs/partnership/class/partnershiputils.class.php
+++ b/htdocs/partnership/class/partnershiputils.class.php
@@ -1,5 +1,6 @@
 <?php
 /* Copyright (C) 2021 NextGestion  <contact@nextgestion.com>
+ * Copyright (C) 2024		MDW							<mdeweerd@users.noreply.github.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -91,7 +92,7 @@ class PartnershipUtils
 		dol_syslog(get_class($this)."::doCancelStatusOfMemberPartnership cancel expired partnerships with grace delay of ".$gracedelay);
 
 		$now = dol_now();
-		$datetotest = dol_time_plus_duree($now, -1 * abs($gracedelay), 'd');
+		$datetotest = dol_time_plus_duree($now, -1 * abs((float) $gracedelay), 'd');
 
 		$this->db->begin();