diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/osal/usb_osal.c b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/osal/usb_osal.c
index e65d50ed6..0f6b7c988 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/osal/usb_osal.c
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/osal/usb_osal.c
@@ -330,4 +330,11 @@ size_t usb_osal_enter_critical_section(void){
 
 void usb_osal_leave_critical_section(size_t flag){
     
+}
+
+
+void usb_osal_msleep(uint32_t delay){
+    if(delay > 0){
+        
+    }
 }
\ No newline at end of file