diff --git a/libc/kernel/uapi/linux/mman.h b/libc/kernel/uapi/linux/mman.h
index b0ce77e..0c9c397 100644
--- a/libc/kernel/uapi/linux/mman.h
+++ b/libc/kernel/uapi/linux/mman.h
@@ -33,7 +33,9 @@
 #define MAP_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB
 #define MAP_HUGE_8MB HUGETLB_FLAG_ENCODE_8MB
 #define MAP_HUGE_16MB HUGETLB_FLAG_ENCODE_16MB
+#define MAP_HUGE_32MB HUGETLB_FLAG_ENCODE_32MB
 #define MAP_HUGE_256MB HUGETLB_FLAG_ENCODE_256MB
+#define MAP_HUGE_512MB HUGETLB_FLAG_ENCODE_512MB
 #define MAP_HUGE_1GB HUGETLB_FLAG_ENCODE_1GB
 #define MAP_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB
 #define MAP_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB