diff --git a/lib/foreman/engine.rb b/lib/foreman/engine.rb
index 04f70d6..0ad7c47 100644
--- a/lib/foreman/engine.rb
+++ b/lib/foreman/engine.rb
@@ -36,7 +36,7 @@ class Foreman::Engine
 
   def process_order
     processes
-    @order
+    @order.uniq
   end
 
   def processes_in_order