diff --git a/islandora.module b/islandora.module
index 7d58c865..7d2c0acb 100644
--- a/islandora.module
+++ b/islandora.module
@@ -1439,7 +1439,7 @@ function islandora_islandora_object_access($op, $object, $user) {
 /**
  * Hookable access callback for datastreams.
  *
- * Requires the equivalent permissions on the object.
+ * Positive permissions on object access suggests on the datastream.
  */
 function islandora_datastream_access($op, $datastream, $user = NULL) {
   $cache = &drupal_static(__FUNCTION__);
@@ -1468,10 +1468,9 @@ function islandora_datastream_access($op, $datastream, $user = NULL) {
       $user,
     ));
 
-    // Neither the object nor the datastream check returned FALSE, and one in
-    // the object or datastream checks returned TRUE.
+    // The datastream check returned FALSE, and one in the object or datastream
+    // checks returned TRUE.
     $cache[$op][$datastream->parent->id][$datastream->id][$user->uid] = (
-      !in_array(FALSE, $object_results, TRUE) &&
       !in_array(FALSE, $datastream_results, TRUE) &&
       (in_array(TRUE, $object_results, TRUE) ||  in_array(TRUE, $datastream_results, TRUE))
     );
diff --git a/tests/islandora_hooked_access_test.module b/tests/islandora_hooked_access_test.module
index de417738..e69fc1cc 100644
--- a/tests/islandora_hooked_access_test.module
+++ b/tests/islandora_hooked_access_test.module
@@ -23,6 +23,9 @@ function islandora_hooked_access_test_islandora_object_access($op, $object, $use
  * Implements hook_islandora_datastream_access().
  */
 function islandora_hooked_access_test_islandora_datastream_access($op, $datastream, $user) {
+  if ($op == FEDORA_PURGE) {
+    return FALSE;
+  }
   if (isset($_SESSION['islandora_hooked_access_test']) && $_SESSION['islandora_hooked_access_test'] === func_get_args()) {
     return TRUE;
   }