diff --git a/src/azure-cli/azure/cli/command_modules/vm/_params.py b/src/azure-cli/azure/cli/command_modules/vm/_params.py
index f0bddfb2928..06f589b243f 100644
--- a/src/azure-cli/azure/cli/command_modules/vm/_params.py
+++ b/src/azure-cli/azure/cli/command_modules/vm/_params.py
@@ -745,7 +745,7 @@ def load_arguments(self, _):
             c.argument('publisher', help='The name of the extension publisher.')
             c.argument('settings', type=validate_file_or_dict, help='Extension settings in JSON format. A JSON file path is also accepted.')
             c.argument('protected_settings', type=validate_file_or_dict, help='Protected settings in JSON format for sensitive information like credentials. A JSON file path is also accepted.')
-            c.argument('version', help='The version of the extension')
+            c.argument('version', help='The version of the extension. To pin extension version to this value, please specify --no-auto-upgrade.')
 
     with self.argument_context('vm extension set') as c:
         c.argument('vm_extension_name', name_arg_type,