diff --git a/src/unix/nuttx/mod.rs b/src/unix/nuttx/mod.rs
index b1100342b8bc..2380bba1ba40 100644
--- a/src/unix/nuttx/mod.rs
+++ b/src/unix/nuttx/mod.rs
@@ -473,23 +473,23 @@ pub const F_GETFL: i32 = 0x2;
 pub const F_SETFD: i32 = 8;
 pub const F_SETFL: i32 = 9;
 // open flag settings for open() (and related APIs)
-pub const O_RDONLY: i32 = 0x1;
-pub const O_WRONLY: i32 = 0x2;
-pub const O_RDWR: i32 = 0x3;
-pub const O_CREAT: i32 = 0x4;
-pub const O_EXCL: i32 = 0x8;
-pub const O_NOCTTY: i32 = 0x0;
-pub const O_TRUNC: i32 = 0x20;
-pub const O_APPEND: i32 = 0x10;
-pub const O_NONBLOCK: i32 = 0x40;
-pub const O_DSYNC: i32 = 0x80;
-pub const O_DIRECT: i32 = 0x200;
-pub const O_LARGEFILE: i32 = 0x2000;
-pub const O_DIRECTORY: i32 = 0x800;
-pub const O_NOFOLLOW: i32 = 0x1000;
+pub const O_RDONLY: i32 = 0x0;
+pub const O_WRONLY: i32 = 0x1;
+pub const O_RDWR: i32 = 0x2;
+pub const O_CREAT: i32 = 0x40;
+pub const O_EXCL: i32 = 0x80;
+pub const O_NOCTTY: i32 = 0x100;
+pub const O_TRUNC: i32 = 0x200;
+pub const O_APPEND: i32 = 0x400;
+pub const O_NONBLOCK: i32 = 0x800;
+pub const O_DSYNC: i32 = 0x1000;
+pub const O_DIRECT: i32 = 0x4000;
+pub const O_LARGEFILE: i32 = 0x8000;
+pub const O_DIRECTORY: i32 = 0x10000;
+pub const O_NOFOLLOW: i32 = 0x20000;
 pub const O_NOATIME: i32 = 0x40000;
-pub const O_CLOEXEC: i32 = 0x400;
-pub const O_ACCMODE: i32 = 0x0003;
+pub const O_CLOEXEC: i32 = 0x80000;
+pub const O_ACCMODE: i32 = 0x3;
 pub const AT_FDCWD: i32 = -100;
 pub const AT_REMOVEDIR: i32 = 0x200;