diff --git a/vendor/golang.org/x/sys/unix/ztypes_aix_ppc64.go b/vendor/golang.org/x/sys/unix/ztypes_aix_ppc64.go
index b4a069e..07ed733 100644
--- a/vendor/golang.org/x/sys/unix/ztypes_aix_ppc64.go
+++ b/vendor/golang.org/x/sys/unix/ztypes_aix_ppc64.go
@@ -1,6 +1,7 @@
 // cgo -godefs types_aix.go | go run mkpost.go
 // Code generated by the command above; see README.md. DO NOT EDIT.
 
+//go:build ppc64 && aix
 // +build ppc64,aix
 
 package unix
@@ -223,6 +224,7 @@
 	SizeofSockaddrUnix     = 0x401
 	SizeofSockaddrDatalink = 0x80
 	SizeofLinger           = 0x8
+	SizeofIovec            = 0x10
 	SizeofIPMreq           = 0x8
 	SizeofIPv6Mreq         = 0x14
 	SizeofIPv6MTUInfo      = 0x20