diff --git a/optional.hpp b/optional.hpp
index 246a0f1..dd919fc 100644
--- a/optional.hpp
+++ b/optional.hpp
@@ -910,6 +910,8 @@ public:
       this->m_value.~T();
       this->m_has_value = false;
     }
+
+    return *this;
   }
 
   // TODO conditionally delete, check exception guarantee