diff --git a/config/routes.rb b/config/routes.rb
index a3e5a772d96..ce8a19fc7db 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -20,7 +20,8 @@ Discourse::Application.routes.draw do
     mount Sidekiq::Web => "/sidekiq"
     mount Logster::Web => "/logs"
   else
-    mount Sidekiq::Web => "/sidekiq", constraints: AdminConstraint.new
+    # only allow sidekie in master site
+    mount Sidekiq::Web => "/sidekiq", constraints: AdminConstraint.new(require_master: true)
     mount Logster::Web => "/logs", constraints: AdminConstraint.new
   end
 
diff --git a/lib/admin_constraint.rb b/lib/admin_constraint.rb
index 2d5df1f5bd4..923e5e806c0 100644
--- a/lib/admin_constraint.rb
+++ b/lib/admin_constraint.rb
@@ -2,7 +2,12 @@ require_dependency 'current_user'
 
 class AdminConstraint
 
+  def initialize(options={})
+    @require_master = options[:require_master]
+  end
+
   def matches?(request)
+    return false if @require_master && RailsMultisite::ConnectionManagement.current_db != "default"
     provider = Discourse.current_user_provider.new(request.env)
     provider.current_user && provider.current_user.admin?
   end