diff --git a/src/ptvsd/adapter/__main__.py b/src/ptvsd/adapter/__main__.py
index 9d706d4b..237a3eb7 100644
--- a/src/ptvsd/adapter/__main__.py
+++ b/src/ptvsd/adapter/__main__.py
@@ -13,12 +13,13 @@ import argparse
 
 def main(args):
     import ptvsd
-    from ptvsd.common import log
+    from ptvsd.common import log, options
     from ptvsd.adapter import channels
 
     if args.cls:
         print("\033c")
 
+    options.log_dir = args.log_dir
     log.stderr_levels |= {"info"}
     log.filename_prefix = "ptvsd.adapter"
     log.to_file()
@@ -75,6 +76,13 @@ def _parse_argv():
         help="clear screen before starting the debuggee",
     )
 
+    parser.add_argument(
+        "--log-dir",
+        type=str,
+        metavar="DIR",
+        help="enable logging and use DIR to save adapter logs"
+    )
+
     return parser.parse_args()