diff --git a/flytekit/clis/sdk_in_container/register.py b/flytekit/clis/sdk_in_container/register.py
index 45e41efe47..e704534d1f 100644
--- a/flytekit/clis/sdk_in_container/register.py
+++ b/flytekit/clis/sdk_in_container/register.py
@@ -52,7 +52,7 @@
     required=False,
     type=click.Path(dir_okay=True, file_okay=False, writable=True, resolve_path=True),
     default=None,
-    help="Directory to write the output zip file containing the protobuf definitions",
+    help="Directory to write the output tar file containing the protobuf definitions",
 )
 @click.option(
     "-D",