diff --git a/unix/mkerrors.sh b/unix/mkerrors.sh
index e91cb82c1..53a249312 100755
--- a/unix/mkerrors.sh
+++ b/unix/mkerrors.sh
@@ -107,6 +107,7 @@ includes_FreeBSD='
 #include <sys/types.h>
 #include <sys/disk.h>
 #include <sys/event.h>
+#include <sys/sched.h>
 #include <sys/select.h>
 #include <sys/socket.h>
 #include <sys/sockio.h>
@@ -297,6 +298,7 @@ includes_NetBSD='
 #include <sys/extattr.h>
 #include <sys/mman.h>
 #include <sys/mount.h>
+#include <sys/sched.h>
 #include <sys/select.h>
 #include <sys/socket.h>
 #include <sys/sockio.h>
diff --git a/unix/zerrors_netbsd_386.go b/unix/zerrors_netbsd_386.go
index 96b9b8ab3..20f3a5799 100644
--- a/unix/zerrors_netbsd_386.go
+++ b/unix/zerrors_netbsd_386.go
@@ -158,6 +158,12 @@ const (
 	CLONE_SIGHAND                     = 0x800
 	CLONE_VFORK                       = 0x4000
 	CLONE_VM                          = 0x100
+	CPUSTATES                         = 0x5
+	CP_IDLE                           = 0x4
+	CP_INTR                           = 0x3
+	CP_NICE                           = 0x1
+	CP_SYS                            = 0x2
+	CP_USER                           = 0x0
 	CREAD                             = 0x800
 	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
diff --git a/unix/zerrors_netbsd_amd64.go b/unix/zerrors_netbsd_amd64.go
index ed522a84e..90b8fcd29 100644
--- a/unix/zerrors_netbsd_amd64.go
+++ b/unix/zerrors_netbsd_amd64.go
@@ -158,6 +158,12 @@ const (
 	CLONE_SIGHAND                     = 0x800
 	CLONE_VFORK                       = 0x4000
 	CLONE_VM                          = 0x100
+	CPUSTATES                         = 0x5
+	CP_IDLE                           = 0x4
+	CP_INTR                           = 0x3
+	CP_NICE                           = 0x1
+	CP_SYS                            = 0x2
+	CP_USER                           = 0x0
 	CREAD                             = 0x800
 	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
diff --git a/unix/zerrors_netbsd_arm.go b/unix/zerrors_netbsd_arm.go
index c8d36fe99..c5c03993b 100644
--- a/unix/zerrors_netbsd_arm.go
+++ b/unix/zerrors_netbsd_arm.go
@@ -150,6 +150,12 @@ const (
 	BRKINT                            = 0x2
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
+	CPUSTATES                         = 0x5
+	CP_IDLE                           = 0x4
+	CP_INTR                           = 0x3
+	CP_NICE                           = 0x1
+	CP_SYS                            = 0x2
+	CP_USER                           = 0x0
 	CREAD                             = 0x800
 	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
diff --git a/unix/zerrors_netbsd_arm64.go b/unix/zerrors_netbsd_arm64.go
index f1c146a74..14dd3c1d1 100644
--- a/unix/zerrors_netbsd_arm64.go
+++ b/unix/zerrors_netbsd_arm64.go
@@ -158,6 +158,12 @@ const (
 	CLONE_SIGHAND                     = 0x800
 	CLONE_VFORK                       = 0x4000
 	CLONE_VM                          = 0x100
+	CPUSTATES                         = 0x5
+	CP_IDLE                           = 0x4
+	CP_INTR                           = 0x3
+	CP_NICE                           = 0x1
+	CP_SYS                            = 0x2
+	CP_USER                           = 0x0
 	CREAD                             = 0x800
 	CRTSCTS                           = 0x10000
 	CS5                               = 0x0