diff --git a/V203/ch32v203/CH32V20xxx.h b/V203/ch32v203/CH32V20xxx.h
index 424a4bc..ea4eccc 100644
--- a/V203/ch32v203/CH32V20xxx.h
+++ b/V203/ch32v203/CH32V20xxx.h
@@ -8958,6 +8958,7 @@ struct USART1_Type       { /*!< Universal synchronous asynchronous receiver tran
     } B;
     __IO uint32_t  R;
     explicit STATR_DEF () noexcept { R = 0x000000c0u; }
+    explicit STATR_DEF (volatile STATR_DEF & o) noexcept { R = o.R; };
     template<typename F> void setbit (F f) volatile {
       STATR_DEF r;
       R = f (r);