diff --git a/include/rcp.h b/include/rcp.h
index 1d169bc..a7e195b 100644
--- a/include/rcp.h
+++ b/include/rcp.h
@@ -113,7 +113,7 @@ public:
     }
 
     template <typename U>
-    rcp(rcp<U> && other) : ptr(static_cast<T *>(other.ptr))
+    rcp(rcp<U> && other) noexcept : ptr(static_cast<T *>(other.ptr))
     {
         static_assert(std::is_base_of<T, U>::value, "rcp: implicit cast must be an upcast");
         other.ptr = nullptr;