diff --git a/src/sys/unix/hostcalls_impl/fs.rs b/src/sys/unix/hostcalls_impl/fs.rs
index f982a3af3b..becf117624 100644
--- a/src/sys/unix/hostcalls_impl/fs.rs
+++ b/src/sys/unix/hostcalls_impl/fs.rs
@@ -56,7 +56,7 @@ pub(crate) fn fd_advise(
         let host_advice = match advice {
             host::__WASI_ADVICE_DONTNEED => PosixFadviseAdvice::POSIX_FADV_DONTNEED,
             host::__WASI_ADVICE_SEQUENTIAL => PosixFadviseAdvice::POSIX_FADV_SEQUENTIAL,
-            host::__WASI_ADVICE_WILLNEED => PosixFadviseAdvice::POSIX_FADV_DONTNEED,
+            host::__WASI_ADVICE_WILLNEED => PosixFadviseAdvice::POSIX_FADV_WILLNEED,
             host::__WASI_ADVICE_NOREUSE => PosixFadviseAdvice::POSIX_FADV_NOREUSE,
             host::__WASI_ADVICE_RANDOM => PosixFadviseAdvice::POSIX_FADV_RANDOM,
             host::__WASI_ADVICE_NORMAL => PosixFadviseAdvice::POSIX_FADV_NORMAL,