diff --git a/unix/ztypes_linux.go b/unix/ztypes_linux.go
index 41b0cd09..e61891df 100644
--- a/unix/ztypes_linux.go
+++ b/unix/ztypes_linux.go
@@ -750,13 +750,12 @@ const (
 
 	AT_RECURSIVE = 0x8000
 
-	OPEN_TREE_CLONE   = 0x1
-	OPEN_TREE_CLOEXEC = 0x80000
-
 	AT_SYMLINK_FOLLOW   = 0x400
 	AT_SYMLINK_NOFOLLOW = 0x100
 
 	AT_EACCESS = 0x200
+
+	OPEN_TREE_CLONE = 0x1
 )
 
 type OpenHow struct {
diff --git a/unix/ztypes_linux_386.go b/unix/ztypes_linux_386.go
index 531aefab..0d8ba0a9 100644
--- a/unix/ztypes_linux_386.go
+++ b/unix/ztypes_linux_386.go
@@ -240,6 +240,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_amd64.go b/unix/ztypes_linux_amd64.go
index 727f664b..0243228f 100644
--- a/unix/ztypes_linux_amd64.go
+++ b/unix/ztypes_linux_amd64.go
@@ -255,6 +255,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_arm.go b/unix/ztypes_linux_arm.go
index 639141b1..1b00b6c0 100644
--- a/unix/ztypes_linux_arm.go
+++ b/unix/ztypes_linux_arm.go
@@ -231,6 +231,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_arm64.go b/unix/ztypes_linux_arm64.go
index 6cb03b1d..2fa62e10 100644
--- a/unix/ztypes_linux_arm64.go
+++ b/unix/ztypes_linux_arm64.go
@@ -234,6 +234,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_mips.go b/unix/ztypes_linux_mips.go
index 4a155545..48da0b40 100644
--- a/unix/ztypes_linux_mips.go
+++ b/unix/ztypes_linux_mips.go
@@ -236,6 +236,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_mips64.go b/unix/ztypes_linux_mips64.go
index e1084926..4fadda36 100644
--- a/unix/ztypes_linux_mips64.go
+++ b/unix/ztypes_linux_mips64.go
@@ -237,6 +237,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_mips64le.go b/unix/ztypes_linux_mips64le.go
index 8904ac84..05f95751 100644
--- a/unix/ztypes_linux_mips64le.go
+++ b/unix/ztypes_linux_mips64le.go
@@ -237,6 +237,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_mipsle.go b/unix/ztypes_linux_mipsle.go
index a1a28cc7..55980517 100644
--- a/unix/ztypes_linux_mipsle.go
+++ b/unix/ztypes_linux_mipsle.go
@@ -236,6 +236,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_ppc.go b/unix/ztypes_linux_ppc.go
index abdc5345..94d11fad 100644
--- a/unix/ztypes_linux_ppc.go
+++ b/unix/ztypes_linux_ppc.go
@@ -243,6 +243,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_ppc64.go b/unix/ztypes_linux_ppc64.go
index f4afbbe0..c7cd7761 100644
--- a/unix/ztypes_linux_ppc64.go
+++ b/unix/ztypes_linux_ppc64.go
@@ -244,6 +244,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_ppc64le.go b/unix/ztypes_linux_ppc64le.go
index ea0b8406..5d8b4be3 100644
--- a/unix/ztypes_linux_ppc64le.go
+++ b/unix/ztypes_linux_ppc64le.go
@@ -244,6 +244,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_riscv64.go b/unix/ztypes_linux_riscv64.go
index 85d0a0d5..c38d8962 100644
--- a/unix/ztypes_linux_riscv64.go
+++ b/unix/ztypes_linux_riscv64.go
@@ -262,6 +262,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_s390x.go b/unix/ztypes_linux_s390x.go
index 81dd9c22..513cb0c7 100644
--- a/unix/ztypes_linux_s390x.go
+++ b/unix/ztypes_linux_s390x.go
@@ -257,6 +257,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x80000
+)
+
 const (
 	POLLRDHUP = 0x2000
 )
diff --git a/unix/ztypes_linux_sparc64.go b/unix/ztypes_linux_sparc64.go
index 6991b00b..0c3e0c48 100644
--- a/unix/ztypes_linux_sparc64.go
+++ b/unix/ztypes_linux_sparc64.go
@@ -239,6 +239,10 @@ type EpollEvent struct {
 	Pad    int32
 }
 
+const (
+	OPEN_TREE_CLOEXEC = 0x400000
+)
+
 const (
 	POLLRDHUP = 0x800
 )