diff --git a/src/header/sys_wait/mod.rs b/src/header/sys_wait/mod.rs
index e62d23c550..b32ed9f792 100644
--- a/src/header/sys_wait/mod.rs
+++ b/src/header/sys_wait/mod.rs
@@ -1,9 +1,15 @@
-//! sys/wait.h implementation for Redox, following
-//! http://pubs.opengroup.org/onlinepubs/7908799/xsh/syswait.h.html
+//! `sys/wait.h` implementation.
+//!
+//! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_wait.h.html>.
 
-use crate::{error::ResultExt, out::Out};
-//use header::sys_resource::rusage;
-use crate::platform::{Pal, Sys, types::*};
+use crate::{
+    error::ResultExt,
+    out::Out,
+    platform::{
+        Pal, Sys,
+        types::{c_int, pid_t},
+    },
+};
 
 pub const WNOHANG: c_int = 1;
 pub const WUNTRACED: c_int = 2;
@@ -18,20 +24,12 @@ pub const __WALL: c_int = 0x4000_0000;
 #[allow(overflowing_literals)]
 pub const __WCLONE: c_int = 0x8000_0000;
 
+/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/wait.html>.
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn wait(stat_loc: *mut c_int) -> pid_t {
     waitpid(!0, stat_loc, 0)
 }
 
-// #[unsafe(no_mangle)]
-// pub unsafe extern "C" fn wait3(
-//     stat_loc: *mut c_int,
-//     options: c_int,
-//     resource_usage: *mut rusage,
-// ) -> pid_t {
-//     unimplemented!();
-// }
-
 /*
  * TODO: implement idtype_t, id_t, and siginfo_t
  *
@@ -46,6 +44,7 @@ pub unsafe extern "C" fn wait(stat_loc: *mut c_int) -> pid_t {
  *  }
  */
 
+/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/waitpid.html>.
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn waitpid(pid: pid_t, stat_loc: *mut c_int, options: c_int) -> pid_t {
     Sys::waitpid(pid, Out::nullable(stat_loc), options).or_minus_one_errno()