diff --git a/libc/kernel/uapi/linux/fsverity.h b/libc/kernel/uapi/linux/fsverity.h
index 5013567..da8b99d 100644
--- a/libc/kernel/uapi/linux/fsverity.h
+++ b/libc/kernel/uapi/linux/fsverity.h
@@ -38,6 +38,23 @@
   __u16 digest_size;
   __u8 digest[];
 };
+struct fsverity_descriptor {
+  __u8 version;
+  __u8 hash_algorithm;
+  __u8 log_blocksize;
+  __u8 salt_size;
+  __le32 __reserved_0x04;
+  __le64 data_size;
+  __u8 root_hash[64];
+  __u8 salt[32];
+  __u8 __reserved[144];
+};
+struct fsverity_formatted_digest {
+  char magic[8];
+  __le16 digest_algorithm;
+  __le16 digest_size;
+  __u8 digest[];
+};
 #define FS_IOC_ENABLE_VERITY _IOW('f', 133, struct fsverity_enable_arg)
 #define FS_IOC_MEASURE_VERITY _IOWR('f', 134, struct fsverity_digest)
 #endif