diff --git a/sys/amd64/include/vmm.h b/sys/amd64/include/vmm.h
--- a/sys/amd64/include/vmm.h
+++ b/sys/amd64/include/vmm.h
@@ -469,7 +469,9 @@
 int vcpu_trace_exceptions(struct vm *vm, int vcpuid);
 #endif	/* KERNEL */
 
+#ifdef _KERNEL
 #define	VM_MAXCPU	16			/* maximum virtual cpus */
+#endif
 
 /*
  * Identifiers for optional vmm capabilities