diff --git a/libc/kernel/uapi/linux/memfd.h b/libc/kernel/uapi/linux/memfd.h
index 914c076..28228df 100644
--- a/libc/kernel/uapi/linux/memfd.h
+++ b/libc/kernel/uapi/linux/memfd.h
@@ -22,6 +22,8 @@
 #define MFD_CLOEXEC 0x0001U
 #define MFD_ALLOW_SEALING 0x0002U
 #define MFD_HUGETLB 0x0004U
+#define MFD_NOEXEC_SEAL 0x0008U
+#define MFD_EXEC 0x0010U
 #define MFD_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT
 #define MFD_HUGE_MASK HUGETLB_FLAG_ENCODE_MASK
 #define MFD_HUGE_64KB HUGETLB_FLAG_ENCODE_64KB