diff --git a/bsp/fujitsu/mb9x/mb9bf500r/key.c b/bsp/fujitsu/mb9x/mb9bf500r/key.c
index 1886e72974..c04dc8c824 100644
--- a/bsp/fujitsu/mb9x/mb9bf500r/key.c
+++ b/bsp/fujitsu/mb9x/mb9bf500r/key.c
@@ -30,7 +30,7 @@ static void key_io_init(void)
 static void key_thread_entry(void *parameter)
 {
 #ifdef RT_USING_RTGUI
-    rt_time_t next_delay;
+    rt_tick_t next_delay;
     rt_uint8_t i;
 
     struct rtgui_event_kbd kbd_event;
@@ -106,7 +106,7 @@ static void key_thread_entry(void *parameter)
     }
 #else
     extern struct rt_messagequeue mq;
-    rt_time_t next_delay;
+    rt_tick_t next_delay;
     struct lcd_msg msg;
     msg.type = KEY_MSG;
 
diff --git a/include/rttypes.h b/include/rttypes.h
index 4f6c9bf6bf..cfbaec8bdb 100644
--- a/include/rttypes.h
+++ b/include/rttypes.h
@@ -88,7 +88,6 @@ typedef rt_ubase_t                       rt_uintptr_t;   /**< Type for unsigned
 #endif /* defined(RT_USING_LIBC) && !defined(RT_USING_NANO) */
 
 typedef rt_base_t                       rt_err_t;       /**< Type for error number */
-typedef rt_uint32_t                     rt_time_t;      /**< Type for time stamp */
 typedef rt_uint32_t                     rt_tick_t;      /**< Type for tick count */
 typedef rt_base_t                       rt_flag_t;      /**< Type for flags */
 typedef rt_ubase_t                      rt_dev_t;       /**< Type for device */
diff --git a/libcpu/arm/s3c24x0/rtc.c b/libcpu/arm/s3c24x0/rtc.c
index ba2c45d443..60703f9d94 100644
--- a/libcpu/arm/s3c24x0/rtc.c
+++ b/libcpu/arm/s3c24x0/rtc.c
@@ -136,7 +136,7 @@ static rt_err_t rtc_control(rt_device_t dev, int cmd, void *args)
         case RT_DEVICE_CTRL_RTC_GET_TIME:
             /* read device */
             rt_hw_rtc_get(&tmp);
-            *((rt_time_t *)args) = timegm(&tmp);
+            *time = timegm(&tmp);
             break;
 
         case RT_DEVICE_CTRL_RTC_SET_TIME: