diff --git a/init.rb b/init.rb
new file mode 100644
index 000000000..1200d4c35
--- /dev/null
+++ b/init.rb
@@ -0,0 +1,5 @@
+require 'delayed_job'
+
+config.after_initialize do
+  Delayed::Worker.guess_backend
+end
\ No newline at end of file
diff --git a/lib/delayed/railtie.rb b/lib/delayed/railtie.rb
index 5d6c76241..57888055d 100644
--- a/lib/delayed/railtie.rb
+++ b/lib/delayed/railtie.rb
@@ -4,14 +4,7 @@
 module Delayed
   class Railtie < Rails::Railtie
     initializer :after_initialize do
-      Delayed::Worker.backend ||= if defined?(ActiveRecord)
-        :active_record
-      elsif defined?(MongoMapper)
-        :mongo_mapper
-      else
-        Delayed::Worker.logger.warn "Could not decide on a backend, defaulting to active_record"
-        :active_record
-      end
+      Delayed::Worker.guess_backend
     end
   end
 end
diff --git a/lib/delayed/worker.rb b/lib/delayed/worker.rb
index 754ef5f22..8d69d2fd5 100644
--- a/lib/delayed/worker.rb
+++ b/lib/delayed/worker.rb
@@ -32,6 +32,17 @@ def self.backend=(backend)
       @@backend = backend
       silence_warnings { ::Delayed.const_set(:Job, backend) }
     end
+    
+    def self.guess_backend
+      self.backend ||= if defined?(ActiveRecord)
+        :active_record
+      elsif defined?(MongoMapper)
+        :mongo_mapper
+      else
+        logger.warn "Could not decide on a backend, defaulting to active_record"
+        :active_record
+      end
+    end
 
     def initialize(options={})
       @quiet = options[:quiet]
diff --git a/rails/init.rb b/rails/init.rb
deleted file mode 100644
index 7c4cc30e8..000000000
--- a/rails/init.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-require 'delayed_job'
-
-config.after_initialize do
-  Delayed::Worker.backend ||= if defined?(ActiveRecord)
-    :active_record
-  elsif defined?(MongoMapper)
-    :mongo_mapper
-  else
-    Delayed::Worker.logger.warn "Could not decide on a backend, defaulting to active_record"
-    :active_record
-  end
-end
\ No newline at end of file