diff --git a/core/Archive/ArchiveInvalidator.php b/core/Archive/ArchiveInvalidator.php
index 2ae18733091..ecf06f38b1a 100644
--- a/core/Archive/ArchiveInvalidator.php
+++ b/core/Archive/ArchiveInvalidator.php
@@ -654,6 +654,10 @@ public function removeInvalidationsFromDistributedList($idSites, $pluginName = n
         $list = new ReArchiveList();
         $entries = $list->getAll();
 
+        // Make sure that idSites is an array or all before using it
+        $idSites = $idSites === 0 || $idSites === '0' || $idSites == 'all'
+            ? 'all' : (is_array($idSites) ? $idSites : [$idSites]);
+
         if ($idSites === 'all') {
             $idSites = $this->getAllSitesId();
         }