diff --git a/demo/usb_host.c b/demo/usb_host.c
index 81c9769c..f809453e 100644
--- a/demo/usb_host.c
+++ b/demo/usb_host.c
@@ -357,10 +357,6 @@ void usbh_videostreaming_parse_yuyv2(struct usbh_urb *urb, struct usbh_videostre
 
 #ifdef __RTTHREAD__
 
-#ifndef RT_USING_TIMER_SOFT
-#error must enable RT_USING_TIMER_SOFT to support timer callback in thread
-#endif
-
 #include <rtthread.h>
 #include <rtdevice.h>
 #include <netif/ethernetif.h>
diff --git a/osal/usb_osal_rtthread.c b/osal/usb_osal_rtthread.c
index 18b66a49..830159d7 100644
--- a/osal/usb_osal_rtthread.c
+++ b/osal/usb_osal_rtthread.c
@@ -8,6 +8,10 @@
 #include <rtthread.h>
 #include <rthw.h>
 
+#ifndef RT_USING_TIMER_SOFT
+#error must enable RT_USING_TIMER_SOFT to support timer callback in thread
+#endif
+
 usb_osal_thread_t usb_osal_thread_create(const char *name, uint32_t stack_size, uint32_t prio, usb_thread_entry_t entry, void *args)
 {
     rt_thread_t htask;