diff --git a/upb/base/status.hpp b/upb/base/status.hpp
index 4d7152b26b..23596ddaf5 100644
--- a/upb/base/status.hpp
+++ b/upb/base/status.hpp
@@ -12,7 +12,7 @@
 
 namespace upb {
 
-class Status {
+class Status final {
  public:
   Status() { upb_Status_Clear(&status_); }