diff --git a/lib/dm-migrations/auto_migration.rb b/lib/dm-migrations/auto_migration.rb
index <HASH>..<HASH> 100644
--- a/lib/dm-migrations/auto_migration.rb
+++ b/lib/dm-migrations/auto_migration.rb
@@ -187,7 +187,7 @@ module DataMapper
       end
       DataMapper::Model.append_extensions(Model)
       Adapters::AbstractAdapter.descendants.each do |adapter_class|
-        Adapters.include_migration_api(ActiveSupport::Inflector.demodulize(adapter_class.name))
+        Adapters.include_migration_api(DataMapper::Inflector.demodulize(adapter_class.name))
       end
     end
Put the Inflector into our own namespace

It's not a sign of being a nice citizen that in case people don't
use ActiveSupport, they end up with this constant defined anyway.