diff --git a/luna/include/luna/Option.h b/luna/include/luna/Option.h
index d8ca65f2..db68653b 100644
--- a/luna/include/luna/Option.h
+++ b/luna/include/luna/Option.h
@@ -113,6 +113,8 @@ template <typename T> class Option
         explicit ErrorHandle()
         {
         }
+
+        friend class Option<T>;
     };
 
     Option(const ErrorHandle&) : m_has_value(false)