diff --git a/src/Scopes/ArchivableScope.php b/src/Scopes/ArchivableScope.php
index 3406cde..451d1a0 100644
--- a/src/Scopes/ArchivableScope.php
+++ b/src/Scopes/ArchivableScope.php
@@ -50,7 +50,7 @@ public function extend(Builder $builder)
      */
     protected function getArchivedAtColumn(Builder $builder)
     {
-        if (count($builder->getQuery()->joins) > 0) {
+        if (count((array) $builder->getQuery()->joins) > 0) {
             return $builder->getModel()->getQualifiedArchivedAtColumn();
         }