diff --git a/wasmtime-wasi/sandboxed-system-primitives/include/wasmtime_ssp.h b/wasmtime-wasi/sandboxed-system-primitives/include/wasmtime_ssp.h
index 660c4b2538..ff46aa235d 100644
--- a/wasmtime-wasi/sandboxed-system-primitives/include/wasmtime_ssp.h
+++ b/wasmtime-wasi/sandboxed-system-primitives/include/wasmtime_ssp.h
@@ -497,15 +497,6 @@ __wasi_errno_t wasmtime_ssp_environ_sizes_get(
     size_t *environ_buf_size
 ) WASMTIME_SSP_SYSCALL_NAME(environ_sizes_get) __attribute__((__warn_unused_result__));
 
-__wasi_errno_t wasmtime_ssp_fd_prestat_dir_name(
-#if !defined(WASMTIME_SSP_STATIC_CURFDS)
-    struct fd_prestats *prestats,
-#endif
-    __wasi_fd_t fd,
-    char *path,
-    size_t path_len
-) WASMTIME_SSP_SYSCALL_NAME(fd_prestat_dir_name) __attribute__((__warn_unused_result__));
-
 __wasi_errno_t wasmtime_ssp_fd_close(
 #if !defined(WASMTIME_SSP_STATIC_CURFDS)
     struct fd_table *curfds,
diff --git a/wasmtime-wasi/sandboxed-system-primitives/src/posix.c b/wasmtime-wasi/sandboxed-system-primitives/src/posix.c
index 95b5846009..42799ca47b 100644
--- a/wasmtime-wasi/sandboxed-system-primitives/src/posix.c
+++ b/wasmtime-wasi/sandboxed-system-primitives/src/posix.c
@@ -652,33 +652,6 @@ static __wasi_errno_t fd_table_insert_fd(
   return fd_table_insert(ft, fo, rights_base, rights_inheriting, out);
 }
 
-__wasi_errno_t wasmtime_ssp_fd_prestat_dir_name(
-#if !defined(WASMTIME_SSP_STATIC_CURFDS)
-    struct fd_prestats *prestats,
-#endif
-    __wasi_fd_t fd,
-    char *path,
-    size_t path_len
-) {
-  rwlock_rdlock(&prestats->lock);
-  struct fd_prestat *prestat;
-  __wasi_errno_t error = fd_prestats_get_entry(prestats, fd, &prestat);
-  if (error != 0) {
-    rwlock_unlock(&prestats->lock);
-    return error;
-  }
-  if (path_len != prestat->dir_name_len) {
-    rwlock_unlock(&prestats->lock);
-    return EINVAL;
-  }
-
-  memcpy(path, prestat->dir_name, path_len);
-
-  rwlock_unlock(&prestats->lock);
-
-  return 0;
-}
-
 __wasi_errno_t wasmtime_ssp_fd_close(
 #if !defined(WASMTIME_SSP_STATIC_CURFDS)
     struct fd_table *curfds,
diff --git a/wasmtime-wasi/src/host_impls.rs b/wasmtime-wasi/src/host_impls.rs
index c73b1e845a..e545c834f7 100644
--- a/wasmtime-wasi/src/host_impls.rs
+++ b/wasmtime-wasi/src/host_impls.rs
@@ -147,6 +147,31 @@ pub fn wasmtime_ssp_fd_prestat_get(
     ret_code
 }
 
+pub fn wasmtime_ssp_fd_prestat_dir_name(
+    prestats: &mut host::fd_prestats,
+    fd: host::__wasi_fd_t,
+    path: &mut [host::char],
+) -> host::__wasi_errno_t {
+    rwlock_rdlock!(prestats);
+
+    let ret_code = if let Some(prestat) = fd_prestats_get_entry(prestats, fd) {
+        if path.len() != prestat.dir_name_len {
+            host::__WASI_EINVAL
+        } else {
+            path.copy_from_slice(unsafe {
+                ::std::slice::from_raw_parts(prestat.dir_name, prestat.dir_name_len)
+            });
+            host::__WASI_ESUCCESS
+        }
+    } else {
+        host::__WASI_EBADF
+    };
+
+    rwlock_unlock!(prestats);
+
+    ret_code
+}
+
 pub fn wasmtime_ssp_sched_yield() -> host::__wasi_errno_t {
     unsafe {
         if libc::sched_yield() < 0 {
diff --git a/wasmtime-wasi/src/syscalls.rs b/wasmtime-wasi/src/syscalls.rs
index 0151095976..6bdf465d99 100644
--- a/wasmtime-wasi/src/syscalls.rs
+++ b/wasmtime-wasi/src/syscalls.rs
@@ -404,7 +404,11 @@ syscalls! {
 
         trace!("     | (path,path_len)={:?}", str_for_trace(path, path_len));
 
-        let e = host::wasmtime_ssp_fd_prestat_dir_name(prestats, fd, path, path_len);
+        let e = host_impls::wasmtime_ssp_fd_prestat_dir_name(
+            &mut *prestats,
+            fd,
+            ::std::slice::from_raw_parts_mut(path, path_len),
+        );
 
         return_encoded_errno(e)
     }