diff --git a/port/ch32/usb_dc_usbfs.c b/port/ch32/usb_dc_usbfs.c
index b7eec7e0..f8258f71 100644
--- a/port/ch32/usb_dc_usbfs.c
+++ b/port/ch32/usb_dc_usbfs.c
@@ -1,6 +1,10 @@
 #include "usbd_core.h"
 #include "usb_ch32_usbfs_reg.h"
 
+#ifdef CONFIG_USB_HS
+#error "usb fs do not support hs"
+#endif
+
 #ifndef USBD_IRQHandler
 #define USBD_IRQHandler OTG_FS_IRQHandler //use actual usb irq name instead
 #endif
diff --git a/port/ch32/usb_dc_usbhs.c b/port/ch32/usb_dc_usbhs.c
index 0e018fcd..2a43ac42 100644
--- a/port/ch32/usb_dc_usbhs.c
+++ b/port/ch32/usb_dc_usbhs.c
@@ -69,7 +69,7 @@ int usb_dc_init(void)
     USBHS_DEVICE->HOST_CTRL = USBHS_PHY_SUSPENDM;
 
     USBHS_DEVICE->CONTROL = 0;
-#if CONFIG_USB_HS
+#ifdef CONFIG_USB_HS
     USBHS_DEVICE->CONTROL = USBHS_DMA_EN | USBHS_INT_BUSY_EN | USBHS_HIGH_SPEED;
 #else
     USBHS_DEVICE->CONTROL = USBHS_DMA_EN | USBHS_INT_BUSY_EN | USBHS_FULL_SPEED;