diff --git a/port/ehci/usb_ehci.h b/port/ehci/usb_ehci.h
index cf25ce30..c2c37b93 100644
--- a/port/ehci/usb_ehci.h
+++ b/port/ehci/usb_ehci.h
@@ -872,7 +872,7 @@ struct ehci_hcor_s
   uint32_t ctrldssegment;    /* 0x10: 4G Segment Selector */
   uint32_t periodiclistbase; /* 0x14: Frame List Base Address */
   uint32_t asynclistaddr;    /* 0x18: Next Asynchronous List Address */
-#ifdef CONFIG_USB_ECHI_HCOR_RESERVED
+#ifndef CONFIG_USB_ECHI_HCOR_RESERVED_DISABLE
   uint32_t reserved[9];
 #endif
   uint32_t configflag;       /* 0x40: Configured Flag Register */
diff --git a/usb_config.h b/usb_config.h
index 07cec261..6a1fc714 100644
--- a/usb_config.h
+++ b/usb_config.h
@@ -54,7 +54,7 @@
 #define CONFIG_USB_EHCI_QH_NUM    (10)
 #define CONFIG_USB_EHCI_QTD_NUM   (10)
 // #define CONFIG_USB_EHCI_INFO_ENABLE
-// #define CONFIG_USB_ECHI_HCOR_RESERVED
+// #define CONFIG_USB_ECHI_HCOR_RESERVED_DISABLE
 // #define CONFIG_USB_EHCI_CONFIGFLAG
 
 #endif
\ No newline at end of file