diff --git a/unix/zerrors_netbsd_386.go b/unix/zerrors_netbsd_386.go
index 1612b660..3eef63f5 100644
--- a/unix/zerrors_netbsd_386.go
+++ b/unix/zerrors_netbsd_386.go
@@ -159,6 +159,7 @@ const (
 	CLONE_VFORK                       = 0x4000
 	CLONE_VM                          = 0x100
 	CREAD                             = 0x800
+	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
 	CS6                               = 0x100
 	CS7                               = 0x200
diff --git a/unix/zerrors_netbsd_amd64.go b/unix/zerrors_netbsd_amd64.go
index c994ab61..40c870be 100644
--- a/unix/zerrors_netbsd_amd64.go
+++ b/unix/zerrors_netbsd_amd64.go
@@ -159,6 +159,7 @@ const (
 	CLONE_VFORK                       = 0x4000
 	CLONE_VM                          = 0x100
 	CREAD                             = 0x800
+	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
 	CS6                               = 0x100
 	CS7                               = 0x200
diff --git a/unix/zerrors_netbsd_arm.go b/unix/zerrors_netbsd_arm.go
index a8f9efed..43c4add5 100644
--- a/unix/zerrors_netbsd_arm.go
+++ b/unix/zerrors_netbsd_arm.go
@@ -151,6 +151,7 @@ const (
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
 	CREAD                             = 0x800
+	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
 	CS6                               = 0x100
 	CS7                               = 0x200
diff --git a/unix/zerrors_openbsd_386.go b/unix/zerrors_openbsd_386.go
index 04e4f331..f47536dc 100644
--- a/unix/zerrors_openbsd_386.go
+++ b/unix/zerrors_openbsd_386.go
@@ -147,6 +147,7 @@ const (
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
 	CREAD                             = 0x800
+	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
 	CS6                               = 0x100
 	CS7                               = 0x200
diff --git a/unix/zerrors_openbsd_amd64.go b/unix/zerrors_openbsd_amd64.go
index c80ff981..c96ca653 100644
--- a/unix/zerrors_openbsd_amd64.go
+++ b/unix/zerrors_openbsd_amd64.go
@@ -147,6 +147,7 @@ const (
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
 	CREAD                             = 0x800
+	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
 	CS6                               = 0x100
 	CS7                               = 0x200
diff --git a/unix/zerrors_openbsd_arm.go b/unix/zerrors_openbsd_arm.go
index 4c320495..4c027352 100644
--- a/unix/zerrors_openbsd_arm.go
+++ b/unix/zerrors_openbsd_arm.go
@@ -147,6 +147,7 @@ const (
 	CFLUSH                            = 0xf
 	CLOCAL                            = 0x8000
 	CREAD                             = 0x800
+	CRTSCTS                           = 0x10000
 	CS5                               = 0x0
 	CS6                               = 0x100
 	CS7                               = 0x200