diff --git a/lib/KiokuDB/Backend/Serialize/JSPON/Collapser.pm b/lib/KiokuDB/Backend/Serialize/JSPON/Collapser.pm
index 5eb738c..3a71510 100644
--- a/lib/KiokuDB/Backend/Serialize/JSPON/Collapser.pm
+++ b/lib/KiokuDB/Backend/Serialize/JSPON/Collapser.pm
@@ -38,7 +38,10 @@ sub visit_object {
         return {
             ( $object->has_class ? ( __CLASS__ => $object->class ) : () ),
             ( $id ? ( id => $id ) : () ),
-            data => $self->visit_hash($object->data),
+            data => ( ref($object->data) eq 'HASH'
+                ? $self->visit_hash($object->data)
+                : $self->visit_array($object->data)
+            ),
         };
     }