diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index e9a3071251..47a6ed7086 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -352,7 +352,7 @@ module ActiveRecord
       end
       
       def migration_files
-        files = Dir["#{@migrations_path}/[0-9]+_*.rb"].sort_by do |f|
+        files = Dir["#{@migrations_path}/[0-9]*_*.rb"].sort_by do |f|
           migration_version_and_name(f).first.to_i
         end
         down? ? files.reverse : files