diff --git a/src/sys/unix/hostcalls_impl/fs.rs b/src/sys/unix/hostcalls_impl/fs.rs
index bbdc3f5f82..a729da512e 100644
--- a/src/sys/unix/hostcalls_impl/fs.rs
+++ b/src/sys/unix/hostcalls_impl/fs.rs
@@ -251,15 +251,15 @@ pub(crate) fn fd_readdir(
             break;
         }
         unsafe {
-            let ptr = host_buf_ptr.offset(host_buf_offset as isize) as *mut c_void
-                as *mut host::__wasi_dirent_t;
+            let ptr =
+                host_buf_ptr.add(host_buf_offset) as *mut c_void as *mut host::__wasi_dirent_t;
             *ptr = entry;
         }
         host_buf_offset += std::mem::size_of_val(&entry);
         let name_ptr = unsafe { *host_entry }.d_name.as_ptr();
         unsafe {
             memcpy(
-                host_buf_ptr.offset(host_buf_offset as isize) as *mut _,
+                host_buf_ptr.add(host_buf_offset) as *mut _,
                 name_ptr as *const _,
                 name_len,
             )