diff --git a/lib/laradi/railtie.rb b/lib/laradi/railtie.rb
index 953d50f..a0709b8 100644
--- a/lib/laradi/railtie.rb
+++ b/lib/laradi/railtie.rb
@@ -3,7 +3,7 @@ module Laradi
     initializer "laradi.construct_di_container" do |app|
       container = Dry::Core::Container.new
 
-      if defined?(config.di_config)
+      if defined?(config.di_config) && config.di_config.respond_to?(:call)
         config.di_config.call(container)
       end