diff --git a/module_utils/decort_utils.py b/module_utils/decort_utils.py
index 53f71c9..7eb3bd1 100644
--- a/module_utils/decort_utils.py
+++ b/module_utils/decort_utils.py
@@ -3136,7 +3136,7 @@ class DecortController(object):
             if runner['vmId'] == comp_facts['id']:
                 existing_rules.append(runner)
 
-        if not len(existing_rules) and not len(new_rules):
+        if not existing_rules and not new_rules:
             self.result['failed'] = False
             self.result['warning'] = ("pfw_configure(): both existing and new port forwarding rule lists "
                                       "for Compute ID {} are empty - nothing to do.").format(comp_facts['id'])