diff --git a/libretro-common/include/streams/file_stream.h b/libretro-common/include/streams/file_stream.h
index e6d6bbca1c..c57731d76a 100644
--- a/libretro-common/include/streams/file_stream.h
+++ b/libretro-common/include/streams/file_stream.h
@@ -63,10 +63,9 @@ const char *filestream_get_ext(RFILE *stream);
  * @bufsize            : optional buffer size (-1 or 0 to use default)
  *
  * Opens a file for reading or writing, depending on the requested mode.
- * If bufsize is > 0 for unbuffered modes (like RFILE_MODE_WRITE), file will instead be fully buffered.
  * Returns a pointer to an RFILE if opened successfully, otherwise NULL.
  **/
-RFILE *filestream_open(const char *path, unsigned mode, ssize_t bufsize);
+RFILE *filestream_open(const char *path, unsigned mode, ssize_t unused);
 
 ssize_t filestream_seek(RFILE *stream, ssize_t offset, int whence);