diff --git a/src/azure-cli-core/azure/cli/core/command_recommender.py b/src/azure-cli-core/azure/cli/core/command_recommender.py
index eeb17d2fe61..e5bb08e2eea 100644
--- a/src/azure-cli-core/azure/cli/core/command_recommender.py
+++ b/src/azure-cli-core/azure/cli/core/command_recommender.py
@@ -251,7 +251,10 @@ def _normalize_parameters(self, parameters):
             if parameter_table:
                 for argument in parameter_table.values():
                     options = argument.type.settings['options_list']
-                    options = (option for option in options if not isinstance(option, Deprecated))
+                    options = [option for option in options if not isinstance(option, Deprecated)]
+                    # skip the positional arguments
+                    if not options:
+                        continue
                     try:
                         sorted_options = sorted(options, key=len, reverse=True)
                         standard_form = sorted_options[0]