3 files changed, 4 insertions, 4 deletions
diff --git a/library/std/src/sys/pal/wasi/fs.rs b/library/std/src/sys/pal/wasi/fs.rs
index 7779d2b97d7..7705e7f6b88 100644
--- a/library/std/src/sys/pal/wasi/fs.rs
+++ b/library/std/src/sys/pal/wasi/fs.rs
@@ -787,7 +787,7 @@ fn open_parent(p: &Path) -> io::Result<(ManuallyDrop<WasiFd>, PathBuf)> {
             }
         }
 
-        extern "C" {
+        unsafe extern "C" {
             pub fn __wasilibc_find_relpath(
                 path: *const libc::c_char,
                 abs_prefix: *mut *const libc::c_char,
diff --git a/library/std/src/sys/pal/wasi/os.rs b/library/std/src/sys/pal/wasi/os.rs
index f7701360f5a..ba2b65a1f40 100644
--- a/library/std/src/sys/pal/wasi/os.rs
+++ b/library/std/src/sys/pal/wasi/os.rs
@@ -16,7 +16,7 @@ use crate::{fmt, io, str, vec};
 mod libc {
     pub use libc::*;
 
-    extern "C" {
+    unsafe extern "C" {
         pub fn getcwd(buf: *mut c_char, size: size_t) -> *mut c_char;
         pub fn chdir(dir: *const c_char) -> c_int;
         pub fn __wasilibc_get_environ() -> *mut *mut c_char;
@@ -46,7 +46,7 @@ cfg_if::cfg_if! {
 }
 
 pub fn errno() -> i32 {
-    extern "C" {
+    unsafe extern "C" {
         #[thread_local]
         static errno: libc::c_int;
     }
diff --git a/library/std/src/sys/pal/wasi/thread.rs b/library/std/src/sys/pal/wasi/thread.rs
index f5e19f26bfe..0ae02369410 100644
--- a/library/std/src/sys/pal/wasi/thread.rs
+++ b/library/std/src/sys/pal/wasi/thread.rs
@@ -35,7 +35,7 @@ cfg_if::cfg_if! {
 
             pub const _SC_NPROCESSORS_ONLN: ffi::c_int = 84;
 
-            extern "C" {
+            unsafe extern "C" {
                 pub fn pthread_create(
                     native: *mut pthread_t,
                     attr: *const pthread_attr_t,