diff --git a/library/include/larra/serialization/auto.hpp b/library/include/larra/serialization/auto.hpp
index 9859c06..3fb64e9 100644
--- a/library/include/larra/serialization/auto.hpp
+++ b/library/include/larra/serialization/auto.hpp
@@ -73,6 +73,10 @@ struct AttributeConfig {
   constexpr auto operator==(const Config<T>&) const -> bool {
     return false;
   }
+  template <typename T>
+  friend constexpr auto operator==(const Config<T>&, const AttributeConfig&) -> bool {
+    return false;
+  }
 };
 
 template <>