diff --git a/includes/tuque_wrapper.inc b/includes/tuque_wrapper.inc
index d14a86b3..f5044db0 100644
--- a/includes/tuque_wrapper.inc
+++ b/includes/tuque_wrapper.inc
@@ -276,8 +276,10 @@ class IslandoraFedoraApiM extends FedoraApiM {
     );
     islandora_alter_datastream($object, $datastream, $context);
     $params = $context['params'];
-    if (isset($params['lastModifiedDate'])) {
-      $params['lastModifiedDate'] = (string) $object[$dsid]->createdDate;
+    // Anything may be altered during the alter_datastream hook invocation so
+    // we need to update our time to the change we know about.
+    if (isset($params['lastModifiedDate']) && $params['lastModifiedDate'] < (string) $object->lastModifiedDate) {
+      $params['lastModifiedDate'] = (string) $object->lastModifiedDate;
     }
     if ($context['block']) {
       throw new Exception('Modify Datastream was blocked.');
diff --git a/tests/includes/utilities.inc b/tests/includes/utilities.inc
index 4eef5255..eefae4cc 100644
--- a/tests/includes/utilities.inc
+++ b/tests/includes/utilities.inc
@@ -315,7 +315,7 @@ class IslandoraTestUtilities extends IslandoraTestUtilityClass {
    *
    * @return bool
    *   TRUE if all objects were removed, or FALSE if any of them still remained
-   *   after removal.   
+   *   after removal.
    */
   public function deleteUserCreatedObjects($username) {
     if ($username === $this->configuration['admin_user']) {