1 files changed, 2 insertions, 1 deletions
diff --git a/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb b/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
index 4e5872b585..de03550ec2 100644
--- a/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
+++ b/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
@@ -1,4 +1,5 @@
 require 'rails/generators/active_record'
+require 'active_support/core_ext/regexp'
 
 module ActiveRecord
   module Generators # :nodoc:
@@ -60,7 +61,7 @@ module ActiveRecord
         # A migration file name can only contain underscores (_), lowercase characters,
         # and numbers 0-9. Any other file name will raise an IllegalMigrationNameError.
         def validate_file_name!
-          unless file_name =~ /^[_a-z0-9]+$/
+          unless /^[_a-z0-9]+$/.match?(file_name)
             raise IllegalMigrationNameError.new(file_name)
           end
         end