diff --git a/docs/reference/migration/migrate_5_0.asciidoc b/docs/reference/migration/migrate_5_0.asciidoc
index 7dc79478c8a..da4ba2c521d 100644
--- a/docs/reference/migration/migrate_5_0.asciidoc
+++ b/docs/reference/migration/migrate_5_0.asciidoc
@@ -7,13 +7,9 @@ your application to Elasticsearch 5.0.
 [float]
 === Indices created before 5.0
 
-Elasticsearch 5.0 can read indices created in version 2.0 and above.  If any
-of your indices were created before 2.0 you will need to upgrade to the
-latest 2.x version of Elasticsearch first, in order to upgrade your indices or
-to delete the old indices. Elasticsearch will not start in the presence of old
-indices. To upgrade 2.x indices, first start a node which have access to all
-the data folders and let it upgrade all the indices before starting up rest of
-the cluster.
+Elasticsearch 5.0 can read indices created in version 2.0 or above.  An
+Elasticsearch 5.0 node will not start in the presence of indices created in a
+version of Elasticsearch before 2.0.
 
 [IMPORTANT]
 .Reindex indices from Elasticseach 1.x or before
@@ -26,6 +22,12 @@ way to do this is to upgrade to Elasticsearch 2.3 or later and to use the
 
 =========================================
 
+The first time Elasticsearch 5.0 starts, it will automatically rename index
+folders to use the index UUID instead of the index name. If you are using
+<<indices-shadow-replicas,shadow replicas>> with shared data folders, first
+start a single node with access to all data folders, and let it rename all
+index folders before starting other nodes in the cluster.
+
 [float]
 === Also see: