diff --git a/source/mijin/util/annot.hpp b/source/mijin/util/annot.hpp
index 471afca..6ee18e4 100644
--- a/source/mijin/util/annot.hpp
+++ b/source/mijin/util/annot.hpp
@@ -170,6 +170,9 @@ public:
     [[nodiscard]]
     constexpr const T& get() const MIJIN_NOEXCEPT { return base_; }
 
+    [[nodiscard]]
+    constexpr T release() && MIJIN_NOEXCEPT { return std::exchange(base_, nullptr); }
+
     template<nullable_type TOther>
     friend class NotNullable;
 };