diff --git a/src/W800_SDK_v1.00.10/lvgl/lvgl_port/lv_port_indev.c b/src/W800_SDK_v1.00.10/lvgl/lvgl_port/lv_port_indev.c
index cd729ff..1e95ca8 100644
--- a/src/W800_SDK_v1.00.10/lvgl/lvgl_port/lv_port_indev.c
+++ b/src/W800_SDK_v1.00.10/lvgl/lvgl_port/lv_port_indev.c
@@ -55,8 +55,10 @@ static void touch_panel_feedback_cb(struct _lv_indev_drv_t *lv_indev_drv, uint8_
 {
     (void)lv_indev_drv;
 
-    uint32_t vibration_duration_ms = persistency_get_settings()->display.display_vibrate_on_touch_duration*50;
     uint16_t vibration_strength = persistency_get_settings()->display.display_vibrate_on_touch_strength*32;
+    uint32_t vibration_duration_ms = 0;
+    if(persistency_get_settings()->display.display_vibrate_on_touch_duration)
+        vibration_duration_ms = persistency_get_settings()->display.display_vibrate_on_touch_duration*50 + 50;
     
     switch(lv_event_code)
     {