diff --git a/libretro-common/streams/file_stream.c b/libretro-common/streams/file_stream.c
index b2db8c5cb5..d62c0e26cb 100644
--- a/libretro-common/streams/file_stream.c
+++ b/libretro-common/streams/file_stream.c
@@ -416,6 +416,7 @@ int filestream_putc(RFILE *stream, int c)
 #if defined(HAVE_BUFFERED_IO)
    return fputc(c, stream->fp);
 #else
+   /* unimplemented */
    return EOF;
 #endif
 }