diff --git a/db/migrate/20160424000002_create_external_sync.rb b/db/migrate/20160424000002_create_external_sync.rb
index 42d585305..03ae0ce85 100644
--- a/db/migrate/20160424000002_create_external_sync.rb
+++ b/db/migrate/20160424000002_create_external_sync.rb
@@ -9,7 +9,7 @@ class CreateExternalSync < ActiveRecord::Migration
       t.timestamps null: false
     end
     add_index :external_syncs, [:source, :source_id], unique: true
-    add_index :external_syncs, [:source, :source_id, :object, :o_id]
+    add_index :external_syncs, [:source, :source_id, :object, :o_id], name: 'index_external_syncs_on_source_and_source_id_and_object_o_id'
     add_index :external_syncs, [:object, :o_id]
   end
 end