diff --git a/db/migrate/20170421195415_add_index_to_token_hashes_on_authie_sessions.authie.rb b/db/migrate/20170421195415_add_index_to_token_hashes_on_authie_sessions.authie.rb
index ca4dd5f..26519e3 100644
--- a/db/migrate/20170421195415_add_index_to_token_hashes_on_authie_sessions.authie.rb
+++ b/db/migrate/20170421195415_add_index_to_token_hashes_on_authie_sessions.authie.rb
@@ -1,6 +1,6 @@
 # This migration comes from authie (originally 20170421174100)
 class AddIndexToTokenHashesOnAuthieSessions < ActiveRecord::Migration
   def change
-    add_index :authie_sessions, :token_hash
+    add_index :authie_sessions, :token_hash, :length => 8
   end
 end
diff --git a/db/schema.rb b/db/schema.rb
index eaf118d..93c5f81 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -53,7 +53,7 @@ ActiveRecord::Schema.define(version: 20170421195415) do
     t.string   "token_hash"
     t.index ["browser_id"], name: "index_authie_sessions_on_browser_id", length: { browser_id: 8 }, using: :btree
     t.index ["token"], name: "index_authie_sessions_on_token", length: { token: 8 }, using: :btree
-    t.index ["token_hash"], name: "index_authie_sessions_on_token_hash", using: :btree
+    t.index ["token_hash"], name: "index_authie_sessions_on_token_hash", length: { token_hash: 8 }, using: :btree
     t.index ["user_id"], name: "index_authie_sessions_on_user_id", using: :btree
   end