diff --git a/file_entity_revisions.install b/file_entity_revisions.install
index 3b492fb..2570f96 100644
--- a/file_entity_revisions.install
+++ b/file_entity_revisions.install
@@ -43,6 +43,7 @@ function file_entity_revisions_schema() {
     'uid' => array('uid'),
     'status' => array('status'),
     'timestamp' => array('timestamp'),
+    'uri' => array('uri'),
   );
 
   // Remove the uniqueness for file uri.
@@ -108,3 +109,16 @@ function file_entity_revisions_update_7001() {
   db_add_index('file_managed_revisions', 'fid', array('fid'));
 }
 
+/**
+ * Add an index on {file_managed_revisions}.uri.
+ */
+function file_entity_revisions_update_7002() {
+  db_add_index('file_managed_revisions', 'uri', array('uri'));
+}
+
+/**
+ * Add an index on {file_managed_revisions}.uri.
+ */
+function file_entity_revisions_update_7003() {
+  db_add_index('file_managed_revisions', 'fid_uri', array('fid', 'uri'));
+}