diff --git a/README.md b/README.md
index 2742fde389..5979da55c5 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,7 @@ It will modify your `config/routes.rb`, adding:
 mount RailsAdmin::Engine => '/admin', :as => 'rails_admin' # Feel free to change '/admin' to any namespace you need.
 ```
 
-Note: Your RailsAdmin namespace cannot match your Devise model name, or you will get an infinite redirect error.
+Note: The `devise_for` route must be placed before the mounted engine. The following will generate infinite redirects.
 The following will generate infinite redirects.
 
 ```ruby
@@ -91,11 +91,11 @@ mount RailsAdmin::Engine => '/admin', :as => 'rails_admin'
 devise_for :admins
 ```
 
-Consider renaming your RailsAdmin namespace:
+This will resolve the infinite redirect error:
 
 ```ruby
-mount RailsAdmin::Engine => '/rails_admin', :as => 'rails_admin'
 devise_for :admins
+mount RailsAdmin::Engine => '/rails_admin', :as => 'rails_admin'
 ```
 
 See [#715](https://github.com/sferik/rails_admin/issues/715) for more details.
diff --git a/lib/generators/rails_admin/install_generator.rb b/lib/generators/rails_admin/install_generator.rb
index 8e866ed32d..03053612fa 100644
--- a/lib/generators/rails_admin/install_generator.rb
+++ b/lib/generators/rails_admin/install_generator.rb
@@ -37,6 +37,10 @@ def install
         display "Looks like you've already installed it, good!"
       end
 
+      namespace = ask_for("Where do you want to mount rails_admin?", "admin", _namespace)
+      gsub_file "config/routes.rb", /mount RailsAdmin::Engine => \'\/.+\', :as => \'rails_admin\'/, ''
+      route("mount RailsAdmin::Engine => '/#{namespace}', :as => 'rails_admin'")
+
       unless routes.index("devise_for")
         model_name = ask_for("What would you like the user model to be called?", "user", _model_name)
         display "Now setting up devise with user model name '#{model_name}':"
@@ -75,9 +79,6 @@ def install
       end
       display "Adding a migration..."
       migration_template 'migration.rb', 'db/migrate/create_rails_admin_histories_table.rb' rescue display $!.message
-      namespace = ask_for("Where do you want to mount rails_admin?", "admin", _namespace)
-      gsub_file "config/routes.rb", /mount RailsAdmin::Engine => \'\/.+\', :as => \'rails_admin\'/, ''
-      route("mount RailsAdmin::Engine => '/#{namespace}', :as => 'rails_admin'")
       display "Job's done: migrate, start your server and visit '/#{namespace}'!", :blue
     end
   end
diff --git a/spec/dummy_app/config/routes.rb b/spec/dummy_app/config/routes.rb
index b48b940d36..1a6424d183 100644
--- a/spec/dummy_app/config/routes.rb
+++ b/spec/dummy_app/config/routes.rb
@@ -2,8 +2,8 @@
   # Needed for :show_in_app tests
   resources :players, :only => [:show]
 
-  mount RailsAdmin::Engine => '/admin', :as => 'rails_admin'
   devise_for :users
+  mount RailsAdmin::Engine => '/admin', :as => 'rails_admin'
   root :to => "rails_admin::Main#dashboard"
   # https://github.com/sferik/rails_admin/issues/362
   match ':controller(/:action(/:id(.:format)))'