diff --git a/libraries/peripherals/STC8x/src/STC8x_WDT.c b/libraries/peripherals/STC8x/src/STC8x_WDT.c
index 7650fe6b68fde9a810ed2820839758882815c08a..17fd80b479e5c23142122c0fe4da3327cfe4a04e 100644
--- a/libraries/peripherals/STC8x/src/STC8x_WDT.c
+++ b/libraries/peripherals/STC8x/src/STC8x_WDT.c
@@ -70,11 +70,11 @@
 		uint32_t Get_WDT_Time(void)
 		{
 			extern uint32_t Get_SysClk_FRE(void);
-			uint8_t i;
 			uint32_t sysClk_FRE,dat = 2;
 			sysClk_FRE = Get_SysClk_FRE();
-			for(i=0; i<(WDT_CONTR & 0x03); i++) dat *= 2;
-			dat = (12 * 32768 * dat) / sysClk_FRE;
+			dat        = 2 << (WDT_CONTR & 0x07);
+			sysClk_FRE = (12000UL << 15) / sysClk_FRE;
+			dat = dat * 1000 * sysClk_FRE;
 			return dat;
 		}