diff --git a/libc/kernel/uapi/asm-generic/mman-common.h b/libc/kernel/uapi/asm-generic/mman-common.h
index b986825..21d0356 100644
--- a/libc/kernel/uapi/asm-generic/mman-common.h
+++ b/libc/kernel/uapi/asm-generic/mman-common.h
@@ -28,8 +28,13 @@
 #define MAP_TYPE 0x0f
 #define MAP_FIXED 0x10
 #define MAP_ANONYMOUS 0x20
-#define MAP_UNINITIALIZED 0x0
+#define MAP_POPULATE 0x008000
+#define MAP_NONBLOCK 0x010000
+#define MAP_STACK 0x020000
+#define MAP_HUGETLB 0x040000
+#define MAP_SYNC 0x080000
 #define MAP_FIXED_NOREPLACE 0x100000
+#define MAP_UNINITIALIZED 0x4000000
 #define MLOCK_ONFAULT 0x01
 #define MS_ASYNC 1
 #define MS_INVALIDATE 2