diff --git a/src/azure-cli/azure/cli/command_modules/acs/custom.py b/src/azure-cli/azure/cli/command_modules/acs/custom.py
index 768cbb00bfd..b5d693c251b 100644
--- a/src/azure-cli/azure/cli/command_modules/acs/custom.py
+++ b/src/azure-cli/azure/cli/command_modules/acs/custom.py
@@ -3234,7 +3234,7 @@ def _remove_osa_nulls(managed_clusters):
     attrs = ['tags', 'plan', 'type', 'id']
     for managed_cluster in managed_clusters:
         for attr in attrs:
-            if getattr(managed_cluster, attr, None) is None:
+            if hasattr(managed_cluster, attr) and getattr(managed_cluster, attr) is None:
                 delattr(managed_cluster, attr)
     return managed_clusters