diff --git a/src/cp/cp.rs b/src/cp/cp.rs
index de05619c41a..ae04475b14d 100644
--- a/src/cp/cp.rs
+++ b/src/cp/cp.rs
@@ -42,7 +42,7 @@ use clap::{App, Arg, ArgMatches};
 use quick_error::ResultExt;
 use std::collections::HashSet;
 use std::fs;
-use std::io::{stdin, stdout, BufRead, BufReader, Write};
+use std::io::{stdin, stdout, Write};
 use std::io;
 use std::path::{Path, PathBuf, StripPrefixError};
 use std::str::FromStr;
@@ -123,7 +123,7 @@ macro_rules! prompt_yes(
         print!(" [y/N]: ");
         crash_if_err!(1, stdout().flush());
         let mut s = String::new();
-        match BufReader::new(stdin()).read_line(&mut s) {
+        match stdin().read_line(&mut s) {
             Ok(_) => match s.char_indices().nth(0) {
                 Some((_, x)) => x == 'y' || x == 'Y',
                 _ => false
diff --git a/src/factor/factor.rs b/src/factor/factor.rs
index 97b92a4d33c..2f5d5bb2f7f 100644
--- a/src/factor/factor.rs
+++ b/src/factor/factor.rs
@@ -23,7 +23,7 @@ use rand::distributions::{Distribution, Uniform};
 use rand::{SeedableRng, thread_rng};
 use rand::rngs::SmallRng;
 use std::cmp::{max, min};
-use std::io::{stdin, BufRead, BufReader};
+use std::io::{stdin, BufRead};
 use std::num::Wrapping;
 use std::mem::swap;
 
@@ -163,7 +163,8 @@ pub fn uumain(args: Vec<String>) -> i32 {
     let matches = new_coreopts!(SYNTAX, SUMMARY, LONG_HELP).parse(args);
 
     if matches.free.is_empty() {
-        for line in BufReader::new(stdin()).lines() {
+        let stdin = stdin();
+        for line in stdin.lock().lines() {
             for number in line.unwrap().split_whitespace() {
                 print_factors_str(number);
             }
diff --git a/src/ln/ln.rs b/src/ln/ln.rs
index d182bd6888f..d6c89f50d10 100644
--- a/src/ln/ln.rs
+++ b/src/ln/ln.rs
@@ -13,7 +13,7 @@
 extern crate uucore;
 
 use std::fs;
-use std::io::{stdin, BufRead, BufReader, Result};
+use std::io::{stdin, Result};
 #[cfg(any(unix, target_os = "redox"))]
 use std::os::unix::fs::symlink;
 #[cfg(windows)]
@@ -303,7 +303,7 @@ fn link(src: &PathBuf, dst: &PathBuf, settings: &Settings) -> Result<()> {
 
 fn read_yes() -> bool {
     let mut s = String::new();
-    match BufReader::new(stdin()).read_line(&mut s) {
+    match stdin().read_line(&mut s) {
         Ok(_) => match s.char_indices().nth(0) {
             Some((_, x)) => x == 'y' || x == 'Y',
             _ => false,
diff --git a/src/mv/mv.rs b/src/mv/mv.rs
index 1b1ee68db60..19746c95679 100644
--- a/src/mv/mv.rs
+++ b/src/mv/mv.rs
@@ -16,7 +16,7 @@ extern crate uucore;
 
 use std::fs;
 use std::env;
-use std::io::{stdin, BufRead, BufReader, Result};
+use std::io::{stdin, Result};
 use std::path::{Path, PathBuf};
 
 static NAME: &str = "mv";
@@ -374,7 +374,7 @@ fn rename(from: &PathBuf, to: &PathBuf, b: &Behaviour) -> Result<()> {
 
 fn read_yes() -> bool {
     let mut s = String::new();
-    match BufReader::new(stdin()).read_line(&mut s) {
+    match stdin().read_line(&mut s) {
         Ok(_) => match s.chars().nth(0) {
             Some(x) => x == 'y' || x == 'Y',
             _ => false,