diff --git a/lib/emscripten/src/syscalls/emscripten_vfs.rs b/lib/emscripten/src/syscalls/emscripten_vfs.rs
index 0e6bbcd00..b9e8a9439 100644
--- a/lib/emscripten/src/syscalls/emscripten_vfs.rs
+++ b/lib/emscripten/src/syscalls/emscripten_vfs.rs
@@ -102,7 +102,9 @@ impl EmscriptenVfs {
         match self.fd_map.get(&fd) {
             Some(FileHandle::Vf(file)) => {
                 let mut mut_ref = RefCell::borrow_mut(file);
-                mut_ref.write_file(buf_slice, 0).into()
+                mut_ref
+                    .write_file(buf_slice, 0)
+                    .map_err(|e| EmscriptenVfsError::Io(e))
             }
             Some(FileHandle::Socket(host_fd)) => unsafe {
                 let result = libc::write(*host_fd, buf_slice.as_ptr() as _, count as _);
@@ -147,9 +149,3 @@ pub enum EmscriptenVfsError {
     Errno(errno::Errno),
     FileSystemError,
 }
-
-impl From<io::Error> for EmscriptenVfsError {
-    fn from(io_error: io::Error) -> Self {
-        EmscriptenVfsError::Io(io_error)
-    }
-}