diff --git a/src/header/pthread/mod.rs b/src/header/pthread/mod.rs
index a6c3801398..1e3f6c52fc 100644
--- a/src/header/pthread/mod.rs
+++ b/src/header/pthread/mod.rs
@@ -108,8 +108,8 @@ fn copy_u64_to_cpuset(mask: u64, cpusetsize: size_t, cpuset: *mut cpu_set_t) ->
 #[cfg(target_os = "redox")]
 fn redox_get_thread_affinity(thread: &crate::pthread::Pthread) -> Result<u64, Errno> {
     let os_tid = unsafe { thread.os_tid.get().read() };
-    let path = alloc::format!("proc:{}/sched-affinity", os_tid.thread_fd);
-    let fd = Sys::open(&path, crate::header::fcntl::O_RDONLY, 0)?;
+    let path = alloc::format!("proc:{}/sched-affinity\0", os_tid.thread_fd);
+    let fd = Sys::open(crate::c_str::CStr::from_bytes_with_nul(path.as_bytes()).unwrap(), crate::header::fcntl::O_RDONLY, 0)?;
 
     let mut buf = [0u8; RLCT_AFFINITY_BYTES];
     let read = Sys::read(fd, &mut buf)?;
@@ -123,8 +123,8 @@ fn redox_get_thread_affinity(thread: &crate::pthread::Pthread) -> Result<u64, Er
 #[cfg(target_os = "redox")]
 fn redox_set_thread_affinity(thread: &crate::pthread::Pthread, mask: u64) -> Result<(), Errno> {
     let os_tid = unsafe { thread.os_tid.get().read() };
-    let path = alloc::format!("proc:{}/sched-affinity", os_tid.thread_fd);
-    let fd = Sys::open(&path, crate::header::fcntl::O_WRONLY, 0)?;
+    let path = alloc::format!("proc:{}/sched-affinity\0", os_tid.thread_fd);
+    let fd = Sys::open(crate::c_str::CStr::from_bytes_with_nul(path.as_bytes()).unwrap(), crate::header::fcntl::O_WRONLY, 0)?;
 
     let bytes = mask.to_ne_bytes();
     let written = Sys::write(fd, &bytes)?;
@@ -554,8 +554,8 @@ pub unsafe extern "C" fn pthread_setname_np(thread: pthread_t, name: *const c_ch
     {
         let thread = unsafe { &*thread.cast::<crate::pthread::Pthread>() };
         let os_tid = unsafe { thread.os_tid.get().read() };
-        let path = alloc::format!("proc:{}/name", os_tid.thread_fd);
-        let fd = match Sys::open(&path, crate::header::fcntl::O_WRONLY, 0) {
+        let path = alloc::format!("proc:{}/name\0", os_tid.thread_fd);
+        let fd = match Sys::open(crate::c_str::CStr::from_bytes_with_nul(path.as_bytes()).unwrap(), crate::header::fcntl::O_WRONLY, 0) {
             Ok(fd) => fd,
             Err(Errno(code)) => return code,
         };
@@ -592,8 +592,8 @@ pub unsafe extern "C" fn pthread_getname_np(
     {
         let thread = unsafe { &*thread.cast::<crate::pthread::Pthread>() };
         let os_tid = unsafe { thread.os_tid.get().read() };
-        let path = alloc::format!("proc:{}/name", os_tid.thread_fd);
-        let fd = match Sys::open(&path, crate::header::fcntl::O_RDONLY, 0) {
+        let path = alloc::format!("proc:{}/name\0", os_tid.thread_fd);
+        let fd = match Sys::open(crate::c_str::CStr::from_bytes_with_nul(path.as_bytes()).unwrap(), crate::header::fcntl::O_RDONLY, 0) {
             Ok(fd) => fd,
             Err(Errno(code)) => return code,
         };