diff --git a/youtube_dl/options.py b/youtube_dl/options.py
index 0a0641bd4..4da03713a 100644
--- a/youtube_dl/options.py
+++ b/youtube_dl/options.py
@@ -803,9 +803,9 @@ def parseOpts(overrideArguments=None):
         dest='postprocessor_args', metavar='ARGS',
         help='Give these arguments to the postprocessor')
     postproc.add_option(
-        '-k', '--keep-video',
+        '-k', '--keep-files', '--keep-video',
         action='store_true', dest='keepvideo', default=False,
-        help='Keep the video file on disk after the post-processing; the video is erased by default')
+        help='Keep original files on disk after the post-processing; original files (videos/subtitles) are erased by default')
     postproc.add_option(
         '--no-post-overwrites',
         action='store_true', dest='nopostoverwrites', default=False,