diff --git a/lib/active_hash/relation.rb b/lib/active_hash/relation.rb
index b41581d1..6e513e29 100644
--- a/lib/active_hash/relation.rb
+++ b/lib/active_hash/relation.rb
@@ -164,13 +164,13 @@ def to_ary
     end
 
     def method_missing(method_name, *args)
-      return super unless klass.scopes.key?(method_name)
+      return super unless klass.scopes&.key?(method_name)
 
       instance_exec(*args, &klass.scopes[method_name])
     end
 
     def respond_to_missing?(method_name, include_private = false)
-      klass.scopes.key?(method_name) || super
+      klass.scopes&.key?(method_name) || super
     end
 
     private