diff --git a/cinderclient/v2/shell.py b/cinderclient/v2/shell.py
index 16412d813..7ee5c877c 100644
--- a/cinderclient/v2/shell.py
+++ b/cinderclient/v2/shell.py
@@ -298,7 +298,7 @@ class CheckSizeArgForCreate(argparse.Action):
 @utils.arg('--allow-multiattach',
            dest='multiattach',
            action="store_true",
-           help=('Allow volume to be attached more than once.'
+           help=('Allow volume to be attached more than once. (DEPRECATED)'
                  ' Default=False'),
            default=False)
 def do_create(cs, args):
diff --git a/cinderclient/v3/shell.py b/cinderclient/v3/shell.py
index 1d4e18a06..b3c294485 100644
--- a/cinderclient/v3/shell.py
+++ b/cinderclient/v3/shell.py
@@ -568,7 +568,7 @@ def do_reset_state(cs, args):
 @utils.arg('--allow-multiattach',
            dest='multiattach',
            action="store_true",
-           help=('Allow volume to be attached more than once.'
+           help=('Allow volume to be attached more than once. (DEPRECATED)'
                  ' Default=False'),
            default=False)
 @utils.arg('--poll',