diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
index 7352d1e..268df3e 100644
--- a/xen/include/public/xen.h
+++ b/xen/include/public/xen.h
@@ -158,7 +158,6 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
 #define VIRQ_CON_RING   8  /* G. (DOM0) Bytes received on console            */
 #define VIRQ_PCPU_STATE 9  /* G. (DOM0) PCPU state changed                   */
 #define VIRQ_MEM_EVENT  10 /* G. (DOM0) A memory event has occured           */
-#define VIRQ_XC_RESERVED 11 /* G. Reserved for XenClient                     */
 #define VIRQ_ENOMEM     12 /* G. (DOM0) Low on heap memory       */
 
 /* Architecture-specific VIRQ definitions. */