diff --git a/middleman-core/lib/middleman-core/config_context.rb b/middleman-core/lib/middleman-core/config_context.rb
index 1f9f32f6..d140e8ea 100644
--- a/middleman-core/lib/middleman-core/config_context.rb
+++ b/middleman-core/lib/middleman-core/config_context.rb
@@ -22,6 +22,10 @@ module Middleman
       app.subscribe_to_callbacks(&method(:execute_callbacks))
     end
 
+    def include(mod)
+      self.extend(mod)
+    end
+
     def helpers(*helper_modules, &block)
       helper_modules ||= []