diff --git a/unix/syscall_aix_ppc.go b/unix/syscall_aix_ppc.go
index bf05603..b3c8e33 100644
--- a/unix/syscall_aix_ppc.go
+++ b/unix/syscall_aix_ppc.go
@@ -29,6 +29,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_aix_ppc64.go b/unix/syscall_aix_ppc64.go
index 13d4321..9a6e024 100644
--- a/unix/syscall_aix_ppc64.go
+++ b/unix/syscall_aix_ppc64.go
@@ -29,6 +29,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_darwin_386.go b/unix/syscall_darwin_386.go
index 2a149f1..cf1bec6 100644
--- a/unix/syscall_darwin_386.go
+++ b/unix/syscall_darwin_386.go
@@ -46,6 +46,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_darwin_amd64.go b/unix/syscall_darwin_amd64.go
index 6b59489..5867ed0 100644
--- a/unix/syscall_darwin_amd64.go
+++ b/unix/syscall_darwin_amd64.go
@@ -46,6 +46,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_darwin_arm.go b/unix/syscall_darwin_arm.go
index d8c51e6..e199e12 100644
--- a/unix/syscall_darwin_arm.go
+++ b/unix/syscall_darwin_arm.go
@@ -49,6 +49,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_darwin_arm64.go b/unix/syscall_darwin_arm64.go
index ce63810..2c50ca9 100644
--- a/unix/syscall_darwin_arm64.go
+++ b/unix/syscall_darwin_arm64.go
@@ -51,6 +51,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_dragonfly_amd64.go b/unix/syscall_dragonfly_amd64.go
index 9babb31..a6b4830 100644
--- a/unix/syscall_dragonfly_amd64.go
+++ b/unix/syscall_dragonfly_amd64.go
@@ -33,6 +33,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_freebsd_386.go b/unix/syscall_freebsd_386.go
index 21e0395..dcc5645 100644
--- a/unix/syscall_freebsd_386.go
+++ b/unix/syscall_freebsd_386.go
@@ -33,6 +33,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_freebsd_amd64.go b/unix/syscall_freebsd_amd64.go
index 9c945a6..321c3ba 100644
--- a/unix/syscall_freebsd_amd64.go
+++ b/unix/syscall_freebsd_amd64.go
@@ -33,6 +33,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_freebsd_arm.go b/unix/syscall_freebsd_arm.go
index 5cd6243..6977008 100644
--- a/unix/syscall_freebsd_arm.go
+++ b/unix/syscall_freebsd_arm.go
@@ -33,6 +33,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_freebsd_arm64.go b/unix/syscall_freebsd_arm64.go
index a318054..dbbbfd6 100644
--- a/unix/syscall_freebsd_arm64.go
+++ b/unix/syscall_freebsd_arm64.go
@@ -33,6 +33,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_linux_386.go b/unix/syscall_linux_386.go
index e2f8cf6..e7fa665 100644
--- a/unix/syscall_linux_386.go
+++ b/unix/syscall_linux_386.go
@@ -372,6 +372,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_linux_amd64.go b/unix/syscall_linux_amd64.go
index 87a3074..088ce0f 100644
--- a/unix/syscall_linux_amd64.go
+++ b/unix/syscall_linux_amd64.go
@@ -163,6 +163,10 @@
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_arm.go b/unix/syscall_linux_arm.go
index f626794..11930fc 100644
--- a/unix/syscall_linux_arm.go
+++ b/unix/syscall_linux_arm.go
@@ -252,6 +252,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_linux_arm64.go b/unix/syscall_linux_arm64.go
index cb20b15..251e2d9 100644
--- a/unix/syscall_linux_arm64.go
+++ b/unix/syscall_linux_arm64.go
@@ -180,6 +180,10 @@
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_mips64x.go b/unix/syscall_linux_mips64x.go
index b3b21ec..7562fe9 100644
--- a/unix/syscall_linux_mips64x.go
+++ b/unix/syscall_linux_mips64x.go
@@ -208,6 +208,10 @@
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_mipsx.go b/unix/syscall_linux_mipsx.go
index 5144d4e..a939ff8 100644
--- a/unix/syscall_linux_mipsx.go
+++ b/unix/syscall_linux_mipsx.go
@@ -220,6 +220,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_linux_ppc64x.go b/unix/syscall_linux_ppc64x.go
index 0a100b6..28d6d0f 100644
--- a/unix/syscall_linux_ppc64x.go
+++ b/unix/syscall_linux_ppc64x.go
@@ -91,6 +91,10 @@
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_riscv64.go b/unix/syscall_linux_riscv64.go
index 6230f64..6798c26 100644
--- a/unix/syscall_linux_riscv64.go
+++ b/unix/syscall_linux_riscv64.go
@@ -179,6 +179,10 @@
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_s390x.go b/unix/syscall_linux_s390x.go
index f81dbdc..eb5cb1a 100644
--- a/unix/syscall_linux_s390x.go
+++ b/unix/syscall_linux_s390x.go
@@ -120,6 +120,10 @@
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_sparc64.go b/unix/syscall_linux_sparc64.go
index b695656..37321c1 100644
--- a/unix/syscall_linux_sparc64.go
+++ b/unix/syscall_linux_sparc64.go
@@ -107,6 +107,10 @@
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_netbsd_386.go b/unix/syscall_netbsd_386.go
index 24f74e5..24da8b5 100644
--- a/unix/syscall_netbsd_386.go
+++ b/unix/syscall_netbsd_386.go
@@ -28,6 +28,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_netbsd_amd64.go b/unix/syscall_netbsd_amd64.go
index 6878bf7..25a0ac8 100644
--- a/unix/syscall_netbsd_amd64.go
+++ b/unix/syscall_netbsd_amd64.go
@@ -28,6 +28,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_netbsd_arm.go b/unix/syscall_netbsd_arm.go
index dbbfcf7..21591ec 100644
--- a/unix/syscall_netbsd_arm.go
+++ b/unix/syscall_netbsd_arm.go
@@ -28,6 +28,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_netbsd_arm64.go b/unix/syscall_netbsd_arm64.go
index f343446..8047496 100644
--- a/unix/syscall_netbsd_arm64.go
+++ b/unix/syscall_netbsd_arm64.go
@@ -28,6 +28,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_openbsd_386.go b/unix/syscall_openbsd_386.go
index d62da60..42b5a0e 100644
--- a/unix/syscall_openbsd_386.go
+++ b/unix/syscall_openbsd_386.go
@@ -28,6 +28,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_openbsd_amd64.go b/unix/syscall_openbsd_amd64.go
index 9a35334..6ea4b48 100644
--- a/unix/syscall_openbsd_amd64.go
+++ b/unix/syscall_openbsd_amd64.go
@@ -28,6 +28,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_openbsd_arm.go b/unix/syscall_openbsd_arm.go
index 5d812aa..1c3d26f 100644
--- a/unix/syscall_openbsd_arm.go
+++ b/unix/syscall_openbsd_arm.go
@@ -28,6 +28,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_openbsd_arm64.go b/unix/syscall_openbsd_arm64.go
index 0fb39cf..a8c458c 100644
--- a/unix/syscall_openbsd_arm64.go
+++ b/unix/syscall_openbsd_arm64.go
@@ -28,6 +28,10 @@
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }