diff --git a/src/chmod/chmod.rs b/src/chmod/chmod.rs
index 8680eb635..fb4179282 100644
--- a/src/chmod/chmod.rs
+++ b/src/chmod/chmod.rs
@@ -183,7 +183,7 @@ fn chmod(files: Vec<String>, changes: bool, quiet: bool, verbose: bool, preserve
 }
 
 fn chmod_file(file: &Path, name: &str, changes: bool, quiet: bool, verbose: bool, fmode: Option<libc::mode_t>, cmode: Option<&String>) -> Result<(), i32> {
-    let path = CString::from_slice(name.as_bytes());
+    let path = CString::new(name).unwrap();
     match fmode {
         Some(mode) => {
             if unsafe { libc::chmod(path.as_ptr(), mode) } == 0 {
diff --git a/src/chroot/chroot.rs b/src/chroot/chroot.rs
index de5b5d083..72e590841 100644
--- a/src/chroot/chroot.rs
+++ b/src/chroot/chroot.rs
@@ -95,8 +95,8 @@ pub fn uumain(args: Vec<String>) -> i32 {
     set_context(&newroot, &opts);
 
     unsafe {
-        let executable = CString::from_slice(command[0].as_bytes()).as_bytes_with_nul().as_ptr();
-        let mut command_parts: Vec<*const u8> = command.iter().map(|x| CString::from_slice(x.as_bytes()).as_bytes_with_nul().as_ptr()).collect();
+        let executable = CString::new(command[0]).unwrap().as_bytes_with_nul().as_ptr();
+        let mut command_parts: Vec<*const u8> = command.iter().map(|x| CString::new(x.as_bytes()).unwrap().as_bytes_with_nul().as_ptr()).collect();
         command_parts.push(std::ptr::null());
         execvp(executable as *const libc::c_char, command_parts.as_ptr() as *mut *const libc::c_char) as i32 
     }
@@ -131,7 +131,7 @@ fn enter_chroot(root: &Path) {
     let root_str = root.display();
     std::os::change_dir(root).unwrap();
     let err = unsafe {
-        chroot(CString::from_slice(b".").as_bytes_with_nul().as_ptr() as *const libc::c_char)
+        chroot(CString::new(b".").unwrap().as_bytes_with_nul().as_ptr() as *const libc::c_char)
     };
     if err != 0 {
         crash!(1, "cannot chroot to {}: {}", root_str, strerror(err).as_slice())
diff --git a/src/common/c_types.rs b/src/common/c_types.rs
index a84142ff8..32db00093 100644
--- a/src/common/c_types.rs
+++ b/src/common/c_types.rs
@@ -133,7 +133,7 @@ pub fn get_pw_from_args(free: &Vec<String>) -> Option<c_passwd> {
         // Passed the username as a string
         } else {
             let pw_pointer = unsafe {
-                let cstr = CString::from_slice(username.as_bytes());
+                let cstr = CString::new(username).unwrap();
                 getpwnam(cstr.as_bytes_with_nul().as_ptr() as *const i8)
             };
             if !pw_pointer.is_null() {
@@ -152,7 +152,7 @@ pub fn get_group(groupname: &str) -> Option<c_group> {
         unsafe { getgrgid(groupname.parse().unwrap()) }
     } else {
         unsafe { 
-            let cstr = CString::from_slice(groupname.as_bytes());
+            let cstr = CString::new(groupname).unwrap();
             getgrnam(cstr.as_bytes_with_nul().as_ptr() as *const c_char)
         }
     };
diff --git a/src/mkfifo/mkfifo.rs b/src/mkfifo/mkfifo.rs
index 7695fb520..8a2eb0fe2 100644
--- a/src/mkfifo/mkfifo.rs
+++ b/src/mkfifo/mkfifo.rs
@@ -68,7 +68,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
 
     let mut exit_status = 0;
     for f in matches.free.iter() {
-        let err = unsafe { mkfifo(CString::from_slice(f.as_bytes()).as_ptr(), mode) };
+        let err = unsafe { mkfifo(CString::new(f.as_bytes()).unwrap().as_ptr(), mode) };
         if err == -1 {
             show_error!("creating '{}': {}", f, os::error_string(os::errno()));
             exit_status = 1;
diff --git a/src/nice/nice.rs b/src/nice/nice.rs
index 1f3dd17b6..4e67bb320 100644
--- a/src/nice/nice.rs
+++ b/src/nice/nice.rs
@@ -102,7 +102,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
             show_warning!("{}", IoError::last_error());
         }
 
-        let cstrs : Vec<CString> = matches.free.iter().map(|x| CString::from_slice(x.as_bytes())).collect();
+        let cstrs : Vec<CString> = matches.free.iter().map(|x| CString::new(x.as_bytes()).unwrap()).collect();
         let mut args : Vec<*const c_char> = cstrs.iter().map(|s| s.as_ptr()).collect();
         args.push(0 as *const c_char);
         unsafe { execvp(args[0], args.as_mut_ptr()); }
diff --git a/src/nohup/nohup.rs b/src/nohup/nohup.rs
index 06ced318a..be03ce704 100644
--- a/src/nohup/nohup.rs
+++ b/src/nohup/nohup.rs
@@ -69,7 +69,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
 
     if unsafe { _vprocmgr_detach_from_console(0) } != std::ptr::null() { crash!(2, "Cannot detach from console")};
 
-    let cstrs : Vec<CString> = opts.free.iter().map(|x| CString::from_slice(x.as_bytes())).collect();
+    let cstrs : Vec<CString> = opts.free.iter().map(|x| CString::new(x.as_bytes()).unwrap()).collect();
     let mut args : Vec<*const c_char> = cstrs.iter().map(|s| s.as_ptr()).collect();
     args.push(std::ptr::null());
     unsafe { execvp(args[0], args.as_mut_ptr())}
diff --git a/src/test/test.rs b/src/test/test.rs
index f5baf4111..b484630bb 100644
--- a/src/test/test.rs
+++ b/src/test/test.rs
@@ -348,7 +348,7 @@ fn path(path: &[u8], cond: PathCondition) -> bool {
         }
     };
 
-    let path = CString::from_slice(path);
+    let path = CString::new(path).unwrap();
     let mut stat = unsafe { std::mem::zeroed() };
     if cond == PathCondition::SymLink {
         if unsafe { lstat(path.as_ptr(), &mut stat) } == 0 {
diff --git a/src/uptime/uptime.rs b/src/uptime/uptime.rs
index 694c7ddc0..aecfb2dc5 100644
--- a/src/uptime/uptime.rs
+++ b/src/uptime/uptime.rs
@@ -108,7 +108,7 @@ fn print_loadavg() {
 #[cfg(unix)]
 fn process_utmpx() -> (Option<time_t>, usize) {
     unsafe {
-        utmpxname(CString::from_slice(DEFAULT_FILE.as_bytes()).as_ptr());
+        utmpxname(CString::new(DEFAULT_FILE).unwrap().as_ptr());
     }
 
     let mut nusers = 0;
diff --git a/src/users/users.rs b/src/users/users.rs
index 92d1e6de9..0001628d7 100644
--- a/src/users/users.rs
+++ b/src/users/users.rs
@@ -91,7 +91,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
 
 fn exec(filename: &str) {
     unsafe {
-        utmpxname(CString::from_slice(filename.as_bytes()).as_ptr());
+        utmpxname(CString::new(filename).unwrap().as_ptr());
     }
 
     let mut users = vec!();