diff --git a/src/base.rs b/src/base.rs
index 11650fd..fef621a 100644
--- a/src/base.rs
+++ b/src/base.rs
@@ -30,6 +30,7 @@
 //! functions.
 
 use std::ffi::{CStr, CString};
+use std::fmt;
 use std::ptr::read;
 use std::sync::Arc;
 
@@ -41,8 +42,6 @@ use libc::{c_char, time_t};
 #[cfg(target_os = "linux")]
 use libc::c_char;
 
-//use os::*;
-
 
 #[cfg(any(target_os = "macos", target_os = "freebsd", target_os = "dragonfly"))]
 #[repr(C)]
@@ -93,6 +92,7 @@ extern {
     fn getegid() -> gid_t;
 }
 
+
 /// Information about a particular user.
 #[derive(Clone)]
 pub struct User {
@@ -137,6 +137,13 @@ impl User {
     }
 }
 
+impl fmt::Debug for User {
+    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+        write!(f, "User({}, {})", self.uid(), self.name())
+    }
+}
+
+
 /// Information about a particular group.
 #[derive(Clone)]
 pub struct Group {
@@ -174,6 +181,13 @@ impl Group {
     }
 }
 
+impl fmt::Debug for Group {
+    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+        write!(f, "Group({}, {})", self.gid(), self.name())
+    }
+}
+
+
 /// Reads data from a `*char` field in `c_passwd` or `g_group` into a UTF-8
 /// `String` for use in a user or group value.
 ///
@@ -352,8 +366,6 @@ pub fn get_effective_groupname() -> Option<String> {
 }
 
 
-
-
 /// OS-specific extensions to users and groups.
 ///
 /// Every OS has a different idea of what data a user or a group comes with.