diff --git a/core/os/os_freebsd.odin b/core/os/os_freebsd.odin
index cdd44d301..1b32128d6 100644
--- a/core/os/os_freebsd.odin
+++ b/core/os/os_freebsd.odin
@@ -112,15 +112,15 @@ EOWNERDEAD:      Errno : 96
 O_RDONLY   :: 0x00000
 O_WRONLY   :: 0x00001
 O_RDWR     :: 0x00002
-O_CREATE   :: 0x00040
-O_EXCL     :: 0x00080
-O_NOCTTY   :: 0x00100
-O_TRUNC    :: 0x00200
-O_NONBLOCK :: 0x00800
-O_APPEND   :: 0x00400
-O_SYNC     :: 0x01000
-O_ASYNC    :: 0x02000
-O_CLOEXEC  :: 0x80000
+O_NONBLOCK :: 0x00004
+O_APPEND   :: 0x00008
+O_ASYNC    :: 0x00040
+O_SYNC     :: 0x00080
+O_CREATE   :: 0x00200
+O_TRUNC    :: 0x00400
+O_EXCL     :: 0x00800
+O_NOCTTY   :: 0x08000
+O_CLOEXEC  :: 0100000
 
 
 SEEK_DATA  :: 3