diff --git a/lib/libc/sys/extattr_get_file.2 b/lib/libc/sys/extattr_get_file.2
index 45b767d2c09..ba835722d41 100644
--- a/lib/libc/sys/extattr_get_file.2
+++ b/lib/libc/sys/extattr_get_file.2
@@ -39,6 +39,7 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
+.In sys/types.h
 .In sys/extattr.h
 .In sys/uio.h
 .Ft int