diff --git a/bsp/w60x/drivers/drv_rtc.c b/bsp/w60x/drivers/drv_rtc.c
index 13fc00ea99..392bb950f3 100644
--- a/bsp/w60x/drivers/drv_rtc.c
+++ b/bsp/w60x/drivers/drv_rtc.c
@@ -55,7 +55,7 @@ static int wm_set_timestamp(time_t timestamp)
     gmtime_r(&timestamp, &tblock);
 
     ctrl2  = tls_reg_read32(HR_PMU_RTC_CTRL2);  /* disable */
-    ctrl2 &= ~(1 << 16);
+    ctrl2 &= ~(BIT(16));
     tls_reg_write32(HR_PMU_RTC_CTRL2, ctrl2);
 
     ctrl1 |= tblock.tm_sec;
@@ -70,7 +70,7 @@ static int wm_set_timestamp(time_t timestamp)
     tls_reg_write32(HR_PMU_RTC_CTRL2, ctrl2);
 
     ctrl2  = tls_reg_read32(HR_PMU_RTC_CTRL2);/* enable */
-    ctrl2 |= (1 << 16);
+    ctrl2 |= BIT(16);
     tls_reg_write32(HR_PMU_RTC_CTRL2, ctrl2);
 
     return RT_EOK;
diff --git a/libcpu/arm/s3c24x0/rtc.c b/libcpu/arm/s3c24x0/rtc.c
index 60703f9d94..2dda7b0334 100644
--- a/libcpu/arm/s3c24x0/rtc.c
+++ b/libcpu/arm/s3c24x0/rtc.c
@@ -31,7 +31,7 @@ void rt_hw_rtc_get(struct tm *ti)
     rt_uint8_t sec, min, hour, mday, wday, mon, year;
 
     /* enable access to RTC registers */
-    RTCCON |= RTC_ENABLE;
+    RTC_ENABLE;
 
     /* read RTC registers */
     do