diff --git a/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php b/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
index db3b3c56855..0ea378672c1 100644
--- a/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
+++ b/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
@@ -66,6 +66,8 @@ class InterfaceWorkflowManager extends DolibarrTriggers
 			return 0; // Module not active, we do nothing
 		}
 
+		$ret = 0;
+
 		// Proposals to order
 		if ($action == 'PROPAL_CLOSE_SIGNED') {
 			dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);