diff --git a/src/header/getopt/mod.rs b/src/header/getopt/mod.rs
index 5a3d926fb9..f095753d30 100644
--- a/src/header/getopt/mod.rs
+++ b/src/header/getopt/mod.rs
@@ -1,4 +1,6 @@
-//! getopt implementation for relibc
+//! `getopt` implementation.
+//!
+//! See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/getopt.html>.
 
 #![deny(unsafe_op_in_unsafe_fn)]
 
@@ -7,7 +9,7 @@ use crate::{
         stdio, string,
         unistd::{optarg, opterr, optind, optopt},
     },
-    platform::types::*,
+    platform::types::{c_char, c_int, size_t},
 };
 use core::ptr;
 
@@ -25,6 +27,11 @@ pub struct option {
     val: c_int,
 }
 
+/// See <https://www.man7.org/linux/man-pages/man3/getopt.3.html>.
+///
+/// Non-POSIX.
+///
+/// Functions the same as `getopt` but also accepts long options.
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn getopt_long(
     argc: c_int,
diff --git a/src/header/unistd/getopt.rs b/src/header/unistd/getopt.rs
index 52e9d3e43e..1729560ab7 100644
--- a/src/header/unistd/getopt.rs
+++ b/src/header/unistd/getopt.rs
@@ -1,8 +1,13 @@
-//! getopt implementation for Redox, following http://pubs.opengroup.org/onlinepubs/009695399/functions/getopt.html
+//! `getopt` implementation.
+//!
+//! See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/getopt.html>.
 
 use core::ptr;
 
-use crate::{header::getopt, platform::types::*};
+use crate::{
+    header::getopt,
+    platform::types::{c_char, c_int},
+};
 
 /// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/getopt.html>.
 #[allow(non_upper_case_globals)]