diff --git a/unix/mkerrors.sh b/unix/mkerrors.sh
index 08f8230d..e91cb82c 100755
--- a/unix/mkerrors.sh
+++ b/unix/mkerrors.sh
@@ -325,6 +325,7 @@ includes_OpenBSD='
 #include <sys/mman.h>
 #include <sys/mount.h>
 #include <sys/select.h>
+#include <sys/sched.h>
 #include <sys/socket.h>
 #include <sys/sockio.h>
 #include <sys/stat.h>
@@ -507,6 +508,8 @@ ccflags="$@"
 		$2 ~ /^(CLOCK|TIMER)_/ ||
 		$2 ~ /^CAN_/ ||
 		$2 ~ /^CAP_/ ||
+		$2 ~ /^CP_/ ||
+		$2 ~ /^CPUSTATES$/ ||
 		$2 ~ /^ALG_/ ||
 		$2 ~ /^FS_(POLICY_FLAGS|KEY_DESC|ENCRYPTION_MODE|[A-Z0-9_]+_KEY_SIZE)/ ||
 		$2 ~ /^FS_IOC_.*(ENCRYPTION|VERITY|[GS]ETFLAGS)/ ||
diff --git a/unix/zerrors_openbsd_386.go b/unix/zerrors_openbsd_386.go
index 5402bd55..c865a10d 100644
--- a/unix/zerrors_openbsd_386.go
+++ b/unix/zerrors_openbsd_386.go
@@ -146,6 +146,13 @@ const (
 	BRKINT                            = 0x2
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
+	CPUSTATES                         = 0x6
+	CP_IDLE                           = 0x5
+	CP_INTR                           = 0x4
+	CP_NICE                           = 0x1
+	CP_SPIN                           = 0x3
+	CP_SYS                            = 0x2
+	CP_USER                           = 0x0
 	CREAD                             = 0x800
 	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
diff --git a/unix/zerrors_openbsd_amd64.go b/unix/zerrors_openbsd_amd64.go
index ffaf2d2f..9db6b2fb 100644
--- a/unix/zerrors_openbsd_amd64.go
+++ b/unix/zerrors_openbsd_amd64.go
@@ -153,6 +153,13 @@ const (
 	CLOCK_REALTIME                    = 0x0
 	CLOCK_THREAD_CPUTIME_ID           = 0x4
 	CLOCK_UPTIME                      = 0x5
+	CPUSTATES                         = 0x6
+	CP_IDLE                           = 0x5
+	CP_INTR                           = 0x4
+	CP_NICE                           = 0x1
+	CP_SPIN                           = 0x3
+	CP_SYS                            = 0x2
+	CP_USER                           = 0x0
 	CREAD                             = 0x800
 	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
diff --git a/unix/zerrors_openbsd_arm.go b/unix/zerrors_openbsd_arm.go
index 7aa796a6..7072526a 100644
--- a/unix/zerrors_openbsd_arm.go
+++ b/unix/zerrors_openbsd_arm.go
@@ -146,6 +146,13 @@ const (
 	BRKINT                            = 0x2
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
+	CPUSTATES                         = 0x6
+	CP_IDLE                           = 0x5
+	CP_INTR                           = 0x4
+	CP_NICE                           = 0x1
+	CP_SPIN                           = 0x3
+	CP_SYS                            = 0x2
+	CP_USER                           = 0x0
 	CREAD                             = 0x800
 	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
diff --git a/unix/zerrors_openbsd_arm64.go b/unix/zerrors_openbsd_arm64.go
index 1792d3f1..ac5efbe5 100644
--- a/unix/zerrors_openbsd_arm64.go
+++ b/unix/zerrors_openbsd_arm64.go
@@ -156,6 +156,13 @@ const (
 	CLOCK_REALTIME                    = 0x0
 	CLOCK_THREAD_CPUTIME_ID           = 0x4
 	CLOCK_UPTIME                      = 0x5
+	CPUSTATES                         = 0x6
+	CP_IDLE                           = 0x5
+	CP_INTR                           = 0x4
+	CP_NICE                           = 0x1
+	CP_SPIN                           = 0x3
+	CP_SYS                            = 0x2
+	CP_USER                           = 0x0
 	CREAD                             = 0x800
 	CRTSCTS                           = 0x10000
 	CS5                               = 0x0