diff --git a/unix/mkerrors.sh b/unix/mkerrors.sh
index 49bd8e7..16b5d04 100755
--- a/unix/mkerrors.sh
+++ b/unix/mkerrors.sh
@@ -258,6 +258,7 @@
 #include <sys/mman.h>
 #include <sys/socket.h>
 #include <sys/sockio.h>
+#include <sys/stat.h>
 #include <sys/sysctl.h>
 #include <sys/termios.h>
 #include <sys/ttycom.h>
diff --git a/unix/types_openbsd.go b/unix/types_openbsd.go
index 649e559..8f2fe70 100644
--- a/unix/types_openbsd.go
+++ b/unix/types_openbsd.go
@@ -101,23 +101,6 @@
 
 // Files
 
-const ( // Directory mode bits
-	S_IFMT   = C.S_IFMT
-	S_IFIFO  = C.S_IFIFO
-	S_IFCHR  = C.S_IFCHR
-	S_IFDIR  = C.S_IFDIR
-	S_IFBLK  = C.S_IFBLK
-	S_IFREG  = C.S_IFREG
-	S_IFLNK  = C.S_IFLNK
-	S_IFSOCK = C.S_IFSOCK
-	S_ISUID  = C.S_ISUID
-	S_ISGID  = C.S_ISGID
-	S_ISVTX  = C.S_ISVTX
-	S_IRUSR  = C.S_IRUSR
-	S_IWUSR  = C.S_IWUSR
-	S_IXUSR  = C.S_IXUSR
-)
-
 type Stat_t C.struct_stat
 
 type Statfs_t C.struct_statfs
diff --git a/unix/zerrors_openbsd_386.go b/unix/zerrors_openbsd_386.go
index 0a1c3e7..7d92f2c 100644
--- a/unix/zerrors_openbsd_386.go
+++ b/unix/zerrors_openbsd_386.go
@@ -1218,6 +1218,34 @@
 	SO_TIMESTAMP                      = 0x800
 	SO_TYPE                           = 0x1008
 	SO_USELOOPBACK                    = 0x40
+	S_BLKSIZE                         = 0x200
+	S_IEXEC                           = 0x40
+	S_IFBLK                           = 0x6000
+	S_IFCHR                           = 0x2000
+	S_IFDIR                           = 0x4000
+	S_IFIFO                           = 0x1000
+	S_IFLNK                           = 0xa000
+	S_IFMT                            = 0xf000
+	S_IFREG                           = 0x8000
+	S_IFSOCK                          = 0xc000
+	S_IREAD                           = 0x100
+	S_IRGRP                           = 0x20
+	S_IROTH                           = 0x4
+	S_IRUSR                           = 0x100
+	S_IRWXG                           = 0x38
+	S_IRWXO                           = 0x7
+	S_IRWXU                           = 0x1c0
+	S_ISGID                           = 0x400
+	S_ISTXT                           = 0x200
+	S_ISUID                           = 0x800
+	S_ISVTX                           = 0x200
+	S_IWGRP                           = 0x10
+	S_IWOTH                           = 0x2
+	S_IWRITE                          = 0x80
+	S_IWUSR                           = 0x80
+	S_IXGRP                           = 0x8
+	S_IXOTH                           = 0x1
+	S_IXUSR                           = 0x40
 	TCIFLUSH                          = 0x1
 	TCIOFLUSH                         = 0x3
 	TCOFLUSH                          = 0x2
diff --git a/unix/zerrors_openbsd_amd64.go b/unix/zerrors_openbsd_amd64.go
index 9710736..b0a7eba 100644
--- a/unix/zerrors_openbsd_amd64.go
+++ b/unix/zerrors_openbsd_amd64.go
@@ -1297,6 +1297,34 @@
 	SO_TYPE                           = 0x1008
 	SO_USELOOPBACK                    = 0x40
 	SO_ZEROIZE                        = 0x2000
+	S_BLKSIZE                         = 0x200
+	S_IEXEC                           = 0x40
+	S_IFBLK                           = 0x6000
+	S_IFCHR                           = 0x2000
+	S_IFDIR                           = 0x4000
+	S_IFIFO                           = 0x1000
+	S_IFLNK                           = 0xa000
+	S_IFMT                            = 0xf000
+	S_IFREG                           = 0x8000
+	S_IFSOCK                          = 0xc000
+	S_IREAD                           = 0x100
+	S_IRGRP                           = 0x20
+	S_IROTH                           = 0x4
+	S_IRUSR                           = 0x100
+	S_IRWXG                           = 0x38
+	S_IRWXO                           = 0x7
+	S_IRWXU                           = 0x1c0
+	S_ISGID                           = 0x400
+	S_ISTXT                           = 0x200
+	S_ISUID                           = 0x800
+	S_ISVTX                           = 0x200
+	S_IWGRP                           = 0x10
+	S_IWOTH                           = 0x2
+	S_IWRITE                          = 0x80
+	S_IWUSR                           = 0x80
+	S_IXGRP                           = 0x8
+	S_IXOTH                           = 0x1
+	S_IXUSR                           = 0x40
 	TCIFLUSH                          = 0x1
 	TCIOFF                            = 0x3
 	TCIOFLUSH                         = 0x3
diff --git a/unix/zerrors_openbsd_arm.go b/unix/zerrors_openbsd_arm.go
index 93e37c4..50c1d9f 100644
--- a/unix/zerrors_openbsd_arm.go
+++ b/unix/zerrors_openbsd_arm.go
@@ -1221,6 +1221,34 @@
 	SO_TIMESTAMP                      = 0x800
 	SO_TYPE                           = 0x1008
 	SO_USELOOPBACK                    = 0x40
+	S_BLKSIZE                         = 0x200
+	S_IEXEC                           = 0x40
+	S_IFBLK                           = 0x6000
+	S_IFCHR                           = 0x2000
+	S_IFDIR                           = 0x4000
+	S_IFIFO                           = 0x1000
+	S_IFLNK                           = 0xa000
+	S_IFMT                            = 0xf000
+	S_IFREG                           = 0x8000
+	S_IFSOCK                          = 0xc000
+	S_IREAD                           = 0x100
+	S_IRGRP                           = 0x20
+	S_IROTH                           = 0x4
+	S_IRUSR                           = 0x100
+	S_IRWXG                           = 0x38
+	S_IRWXO                           = 0x7
+	S_IRWXU                           = 0x1c0
+	S_ISGID                           = 0x400
+	S_ISTXT                           = 0x200
+	S_ISUID                           = 0x800
+	S_ISVTX                           = 0x200
+	S_IWGRP                           = 0x10
+	S_IWOTH                           = 0x2
+	S_IWRITE                          = 0x80
+	S_IWUSR                           = 0x80
+	S_IXGRP                           = 0x8
+	S_IXOTH                           = 0x1
+	S_IXUSR                           = 0x40
 	TCIFLUSH                          = 0x1
 	TCIOFLUSH                         = 0x3
 	TCOFLUSH                          = 0x2
diff --git a/unix/ztypes_openbsd_386.go b/unix/ztypes_openbsd_386.go
index d5a2d75..231f4e8 100644
--- a/unix/ztypes_openbsd_386.go
+++ b/unix/ztypes_openbsd_386.go
@@ -56,23 +56,6 @@
 
 type _Gid_t uint32
 
-const (
-	S_IFMT   = 0xf000
-	S_IFIFO  = 0x1000
-	S_IFCHR  = 0x2000
-	S_IFDIR  = 0x4000
-	S_IFBLK  = 0x6000
-	S_IFREG  = 0x8000
-	S_IFLNK  = 0xa000
-	S_IFSOCK = 0xc000
-	S_ISUID  = 0x800
-	S_ISGID  = 0x400
-	S_ISVTX  = 0x200
-	S_IRUSR  = 0x100
-	S_IWUSR  = 0x80
-	S_IXUSR  = 0x40
-)
-
 type Stat_t struct {
 	Mode           uint32
 	Dev            int32
diff --git a/unix/ztypes_openbsd_amd64.go b/unix/ztypes_openbsd_amd64.go
index 5a9c818..bb2c448 100644
--- a/unix/ztypes_openbsd_amd64.go
+++ b/unix/ztypes_openbsd_amd64.go
@@ -56,23 +56,6 @@
 
 type _Gid_t uint32
 
-const (
-	S_IFMT   = 0xf000
-	S_IFIFO  = 0x1000
-	S_IFCHR  = 0x2000
-	S_IFDIR  = 0x4000
-	S_IFBLK  = 0x6000
-	S_IFREG  = 0x8000
-	S_IFLNK  = 0xa000
-	S_IFSOCK = 0xc000
-	S_ISUID  = 0x800
-	S_ISGID  = 0x400
-	S_ISVTX  = 0x200
-	S_IRUSR  = 0x100
-	S_IWUSR  = 0x80
-	S_IXUSR  = 0x40
-)
-
 type Stat_t struct {
 	Mode    uint32
 	Dev     int32
diff --git a/unix/ztypes_openbsd_arm.go b/unix/ztypes_openbsd_arm.go
index e35b13b..941367c 100644
--- a/unix/ztypes_openbsd_arm.go
+++ b/unix/ztypes_openbsd_arm.go
@@ -56,23 +56,6 @@
 
 type _Gid_t uint32
 
-const (
-	S_IFMT   = 0xf000
-	S_IFIFO  = 0x1000
-	S_IFCHR  = 0x2000
-	S_IFDIR  = 0x4000
-	S_IFBLK  = 0x6000
-	S_IFREG  = 0x8000
-	S_IFLNK  = 0xa000
-	S_IFSOCK = 0xc000
-	S_ISUID  = 0x800
-	S_ISGID  = 0x400
-	S_ISVTX  = 0x200
-	S_IRUSR  = 0x100
-	S_IWUSR  = 0x80
-	S_IXUSR  = 0x40
-)
-
 type Stat_t struct {
 	Mode           uint32
 	Dev            int32