diff --git a/wp-admin/includes/schema.php b/wp-admin/includes/schema.php
index f2c7f5bfe3..b043e49b0c 100644
--- a/wp-admin/includes/schema.php
+++ b/wp-admin/includes/schema.php
@@ -204,7 +204,8 @@ CREATE TABLE $wpdb->posts (
   display_name varchar(250) NOT NULL default '',
   PRIMARY KEY  (ID),
   KEY user_login_key (user_login),
-  KEY user_nicename (user_nicename)
+  KEY user_nicename (user_nicename),
+  KEY user_email (user_email)
 ) $charset_collate;\n";
 
 	// Multisite users table
@@ -223,7 +224,8 @@ CREATE TABLE $wpdb->posts (
   deleted tinyint(2) NOT NULL default '0',
   PRIMARY KEY  (ID),
   KEY user_login_key (user_login),
-  KEY user_nicename (user_nicename)
+  KEY user_nicename (user_nicename),
+  KEY user_email (user_email)
 ) $charset_collate;\n";
 
 	// Usermeta.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 734aa1ab76..ce3dc30d25 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,14 +4,14 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36653';
+$wp_version = '4.5-alpha-36654';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
  *
  * @global int $wp_db_version
  */
-$wp_db_version = 36180;
+$wp_db_version = 36654;
 
 /**
  * Holds the TinyMCE version