diff --git a/sdks/python/apache_beam/options/pipeline_options.py b/sdks/python/apache_beam/options/pipeline_options.py
index 5847f9383be58..71cd7958a6e91 100644
--- a/sdks/python/apache_beam/options/pipeline_options.py
+++ b/sdks/python/apache_beam/options/pipeline_options.py
@@ -414,10 +414,10 @@ def _add_argparse_args(cls, parser):
                         default=False,
                         action='store_true',
                         help='Enable Windmill Service for this Dataflow job. ')
-    parser.add_argument('--gcp_kms_key',
+    parser.add_argument('--dataflow_kms_key',
                         default=None,
                         help='Set a Google Cloud KMS key name to be used in '
-                        'IO operations.')
+                        'Dataflow state operations (GBK, Streaming).')
 
   def validate(self, validator):
     errors = []