diff --git a/islandora.module b/islandora.module
index 0efc7cc4..171fa808 100644
--- a/islandora.module
+++ b/islandora.module
@@ -1737,11 +1737,11 @@ function islandora_datastream_access($op, $datastream, $user = NULL) {
       $user,
     ));
 
-    // The datastream check returned FALSE, and one in the object or datastream
-    // checks returned TRUE.
+    // Nothing returned FALSE at at least one thing returned TRUE
+    // for both the datastream and the object checks.
     $cache[$op][$datastream->parent->id][$datastream->id][$user->uid] = (
-      !in_array(FALSE, $datastream_results, TRUE) &&
-      (in_array(TRUE, $object_results, TRUE) || in_array(TRUE, $datastream_results, TRUE))
+      (!in_array(FALSE, $datastream_results, TRUE) && in_array(TRUE, $datastream_results, TRUE)) &&
+      (!in_array(FALSE, $object_results, TRUE) && in_array(TRUE, $object_results, TRUE))
     );
   }