diff --git a/libc/kernel/uapi/xen/privcmd.h b/libc/kernel/uapi/xen/privcmd.h
index 210a75e..145446b 100644
--- a/libc/kernel/uapi/xen/privcmd.h
+++ b/libc/kernel/uapi/xen/privcmd.h
@@ -59,10 +59,19 @@
   __u16 num;
   const struct privcmd_dm_op_buf __user * ubufs;
 };
+struct privcmd_mmap_resource {
+  domid_t dom;
+  __u32 type;
+  __u32 id;
+  __u32 idx;
+  __u64 num;
+  __u64 addr;
+};
 #define IOCTL_PRIVCMD_HYPERCALL _IOC(_IOC_NONE, 'P', 0, sizeof(struct privcmd_hypercall))
 #define IOCTL_PRIVCMD_MMAP _IOC(_IOC_NONE, 'P', 2, sizeof(struct privcmd_mmap))
 #define IOCTL_PRIVCMD_MMAPBATCH _IOC(_IOC_NONE, 'P', 3, sizeof(struct privcmd_mmapbatch))
 #define IOCTL_PRIVCMD_MMAPBATCH_V2 _IOC(_IOC_NONE, 'P', 4, sizeof(struct privcmd_mmapbatch_v2))
 #define IOCTL_PRIVCMD_DM_OP _IOC(_IOC_NONE, 'P', 5, sizeof(struct privcmd_dm_op))
 #define IOCTL_PRIVCMD_RESTRICT _IOC(_IOC_NONE, 'P', 6, sizeof(domid_t))
+#define IOCTL_PRIVCMD_MMAP_RESOURCE _IOC(_IOC_NONE, 'P', 7, sizeof(struct privcmd_mmap_resource))
 #endif