diff --git a/dvc/command/commit.py b/dvc/command/commit.py
index ef703e117..731b44bac 100644
--- a/dvc/command/commit.py
+++ b/dvc/command/commit.py
@@ -67,7 +67,6 @@ def add_parser(subparsers, parent_parser):
     commit_parser.add_argument(
         "targets",
         nargs="*",
-        default=None,
         help="DVC-files to commit. Optional."
         "(Finds all DVC-files in the workspace by default.)",
     )
diff --git a/dvc/command/data_sync.py b/dvc/command/data_sync.py
index b8319b8d4..17bebcb38 100644
--- a/dvc/command/data_sync.py
+++ b/dvc/command/data_sync.py
@@ -116,7 +116,6 @@ def shared_parent_parser():
     shared_parent_parser.add_argument(
         "targets",
         nargs="*",
-        default=None,
         help="Limit command scope to these DVC-files. "
         "Using -R, directories to search DVC-files in can also be given.",
     )