diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_peripheral_mbed_gcc.a b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_peripheral_mbed_gcc.a
index 352cdf86f6..5760bf2a07 100644
Binary files a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_peripheral_mbed_gcc.a and b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_peripheral_mbed_gcc.a differ
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_wlan_mbed_gcc.a b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_wlan_mbed_gcc.a
index b16999a774..2326ed6134 100644
Binary files a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_wlan_mbed_gcc.a and b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_wlan_mbed_gcc.a differ
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/rtl8195a_timer.h b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/rtl8195a_timer.h
index caf8223d11..42d5c62e0c 100644
--- a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/rtl8195a_timer.h
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/rtl8195a_timer.h
@@ -94,6 +94,11 @@ HalTimerReadCountRtl8195a_Patch(
     IN  u32 TimerId
 );
 
+VOID 
+HalTimerSync(
+    IN u32 TimerId
+);
+
 VOID
 HalTimerIrqEnRtl8195a(
     IN  u32 TimerId
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/hal_timer.h b/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/hal_timer.h
index 3e0b6cce15..b716cbaae3 100644
--- a/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/hal_timer.h
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/hal_timer.h
@@ -53,9 +53,10 @@ typedef struct _HAL_TIMER_OP_ {
 }HAL_TIMER_OP, *PHAL_TIMER_OP;
 
 typedef struct _HAL_TIMER_OP_EXT_ {
-	PHAL_TIMER_OP phal_timer_op_rom;
-	VOID (*HalTimerIrqEn)(u32 TimerId);
-	VOID (*HalTimerReLoad)(u32 TimerId, u32 LoadUs);
+    PHAL_TIMER_OP phal_timer_op_rom;
+    VOID (*HalTimerIrqEn)(u32 TimerId);
+    VOID (*HalTimerReLoad)(u32 TimerId, u32 LoadUs);
+    VOID (*HalTimerSync)(u32 TimerId);
 }HAL_TIMER_OP_EXT, *PHAL_TIMER_OP_EXT;
 
 #ifdef CONFIG_TIMER_MODULE
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/us_ticker.c b/targets/TARGET_Realtek/TARGET_AMEBA/us_ticker.c
index f51f2f4e1c..91d7f40027 100644
--- a/targets/TARGET_Realtek/TARGET_AMEBA/us_ticker.c
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/us_ticker.c
@@ -75,16 +75,13 @@ void us_ticker_init(void)
 uint32_t us_ticker_read(void)
 {
     uint32_t tick_cnt;
-    uint64_t tick_us;
 
     if (!us_ticker_inited) {
         us_ticker_init();
     }
 
     tick_cnt = HalTimerOp.HalTimerReadCount(SYS_TIM_ID);
-    tick_us = TICK_TO_US(0xFFFFFFFFUL - tick_cnt);
-
-    return ((uint32_t)tick_us);  //return ticker value in micro-seconds (us)
+    return (uint32_t)TICK_TO_US(0xFFFFFFFFUL - tick_cnt);
 }
 
 void us_ticker_set_interrupt(timestamp_t timestamp)
@@ -100,6 +97,7 @@ void us_ticker_set_interrupt(timestamp_t timestamp)
 
     HalTimerOp.HalTimerDis((u32)TimerAdapter.TimerId);
     HalTimerOpExt.HalTimerReLoad((u32)TimerAdapter.TimerId, TimerAdapter.TimerLoadValueUs);
+    HalTimerOpExt.HalTimerSync(SYS_TIM_ID);
     HalTimerOp.HalTimerEn((u32)TimerAdapter.TimerId);
 }
 
@@ -109,6 +107,7 @@ void us_ticker_fire_interrupt(void)
 
     HalTimerOp.HalTimerDis((u32)TimerAdapter.TimerId);
     HalTimerOpExt.HalTimerReLoad((u32)TimerAdapter.TimerId, TimerAdapter.TimerLoadValueUs);
+    HalTimerOpExt.HalTimerSync(SYS_TIM_ID);
     HalTimerOp.HalTimerEn((u32)TimerAdapter.TimerId);
 }