diff --git a/htdocs/core/class/html.formfile.class.php b/htdocs/core/class/html.formfile.class.php
index d0d3717a1f1..f6f977d3058 100644
--- a/htdocs/core/class/html.formfile.class.php
+++ b/htdocs/core/class/html.formfile.class.php
@@ -394,7 +394,7 @@ class FormFile
 		$reshook = 0;
 		if (is_object($hookmanager)) {
 			$parameters = array();
-			+			$reshook = $hookmanager->executeHooks('showdocuments', $parameters, $object);
+			$reshook = $hookmanager->executeHooks('showdocuments', $parameters, $object);
 			// May report error
 			if ($reshook < 0) {
 				setEventMessages($hookmanager->error, $hookmanager->errors, 'errors');