diff --git a/unix/zerrors_freebsd_386.go b/unix/zerrors_freebsd_386.go
index 3c2a5bfc..7b95751c 100644
--- a/unix/zerrors_freebsd_386.go
+++ b/unix/zerrors_freebsd_386.go
@@ -225,6 +225,20 @@ const (
 	BRKINT                            = 0x2
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
+	CLOCK_MONOTONIC                   = 0x4
+	CLOCK_MONOTONIC_FAST              = 0xc
+	CLOCK_MONOTONIC_PRECISE           = 0xb
+	CLOCK_PROCESS_CPUTIME_ID          = 0xf
+	CLOCK_PROF                        = 0x2
+	CLOCK_REALTIME                    = 0x0
+	CLOCK_REALTIME_FAST               = 0xa
+	CLOCK_REALTIME_PRECISE            = 0x9
+	CLOCK_SECOND                      = 0xd
+	CLOCK_THREAD_CPUTIME_ID           = 0xe
+	CLOCK_UPTIME                      = 0x5
+	CLOCK_UPTIME_FAST                 = 0x8
+	CLOCK_UPTIME_PRECISE              = 0x7
+	CLOCK_VIRTUAL                     = 0x1
 	CREAD                             = 0x800
 	CS5                               = 0x0
 	CS6                               = 0x100
diff --git a/unix/zerrors_freebsd_amd64.go b/unix/zerrors_freebsd_amd64.go
index 3b3f7a9d..e48e7799 100644
--- a/unix/zerrors_freebsd_amd64.go
+++ b/unix/zerrors_freebsd_amd64.go
@@ -225,6 +225,20 @@ const (
 	BRKINT                            = 0x2
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
+	CLOCK_MONOTONIC                   = 0x4
+	CLOCK_MONOTONIC_FAST              = 0xc
+	CLOCK_MONOTONIC_PRECISE           = 0xb
+	CLOCK_PROCESS_CPUTIME_ID          = 0xf
+	CLOCK_PROF                        = 0x2
+	CLOCK_REALTIME                    = 0x0
+	CLOCK_REALTIME_FAST               = 0xa
+	CLOCK_REALTIME_PRECISE            = 0x9
+	CLOCK_SECOND                      = 0xd
+	CLOCK_THREAD_CPUTIME_ID           = 0xe
+	CLOCK_UPTIME                      = 0x5
+	CLOCK_UPTIME_FAST                 = 0x8
+	CLOCK_UPTIME_PRECISE              = 0x7
+	CLOCK_VIRTUAL                     = 0x1
 	CREAD                             = 0x800
 	CS5                               = 0x0
 	CS6                               = 0x100
diff --git a/unix/ztypes_freebsd_386.go b/unix/ztypes_freebsd_386.go
index 330c0e63..8cf30947 100644
--- a/unix/ztypes_freebsd_386.go
+++ b/unix/ztypes_freebsd_386.go
@@ -1,8 +1,7 @@
+// +build 386,freebsd
 // Created by cgo -godefs - DO NOT EDIT
 // cgo -godefs types_freebsd.go
 
-// +build 386,freebsd
-
 package unix
 
 const (
@@ -140,6 +139,15 @@ type Fsid struct {
 	Val [2]int32
 }
 
+const (
+	FADV_NORMAL     = 0x0
+	FADV_RANDOM     = 0x1
+	FADV_SEQUENTIAL = 0x2
+	FADV_WILLNEED   = 0x3
+	FADV_DONTNEED   = 0x4
+	FADV_NOREUSE    = 0x5
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/unix/ztypes_freebsd_amd64.go b/unix/ztypes_freebsd_amd64.go
index 93395924..e5feb207 100644
--- a/unix/ztypes_freebsd_amd64.go
+++ b/unix/ztypes_freebsd_amd64.go
@@ -1,8 +1,7 @@
+// +build amd64,freebsd
 // Created by cgo -godefs - DO NOT EDIT
 // cgo -godefs types_freebsd.go
 
-// +build amd64,freebsd
-
 package unix
 
 const (
@@ -140,6 +139,15 @@ type Fsid struct {
 	Val [2]int32
 }
 
+const (
+	FADV_NORMAL     = 0x0
+	FADV_RANDOM     = 0x1
+	FADV_SEQUENTIAL = 0x2
+	FADV_WILLNEED   = 0x3
+	FADV_DONTNEED   = 0x4
+	FADV_NOREUSE    = 0x5
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8