diff --git a/freqtrade/commands/cli_options.py b/freqtrade/commands/cli_options.py
index 9aacbcc97..f383f0768 100644
--- a/freqtrade/commands/cli_options.py
+++ b/freqtrade/commands/cli_options.py
@@ -69,7 +69,7 @@ AVAILABLE_CLI_OPTIONS = {
         metavar='PATH',
     ),
     "datadir": Arg(
-        '-d', '--datadir',
+        '-d', '--datadir', '--data-dir',
         help='Path to directory with historical backtesting data.',
         metavar='PATH',
     ),