diff --git a/lib/libc/compat-43/setruid.3 b/lib/libc/compat-43/setruid.3
index db05a3413811..32245c1ff97f 100644
--- a/lib/libc/compat-43/setruid.3
+++ b/lib/libc/compat-43/setruid.3
@@ -39,7 +39,7 @@
 .Nm setrgid
 .Nd set user and group ID
 .Sh SYNOPSIS
-.Fd #include <sys/types.h>
+.Fd #include <unistd.h>
 .Ft int
 .Fn setruid "uid_t ruid"
 .Ft int