diff --git a/EVT/EXAM/SRC/Peripheral/src/ch32v00x_iwdg.c b/EVT/EXAM/SRC/Peripheral/src/ch32v00x_iwdg.c
index 24732197..513ca917 100644
--- a/EVT/EXAM/SRC/Peripheral/src/ch32v00x_iwdg.c
+++ b/EVT/EXAM/SRC/Peripheral/src/ch32v00x_iwdg.c
@@ -92,7 +92,7 @@ void IWDG_ReloadCounter(void)
 void IWDG_Enable(void)
 {
     IWDG->CTLR = CTLR_KEY_Enable;
-    while ((RCC->RSTSCKR & 0x2) == RESET);
+    while ((RCC->RSTSCKR & RCC_LSIRDY) != RCC_LSIRDY);
 }
 
 /*********************************************************************