diff --git a/src/azure-cli/azure/cli/command_modules/vm/_actions.py b/src/azure-cli/azure/cli/command_modules/vm/_actions.py
index 899038d7253..3d06819c59e 100644
--- a/src/azure-cli/azure/cli/command_modules/vm/_actions.py
+++ b/src/azure-cli/azure/cli/command_modules/vm/_actions.py
@@ -298,7 +298,10 @@ def _load_extension_images_from_publisher(publisher):
 
 
 def get_vm_sizes(cli_ctx, location):
-    return list(_compute_client_factory(cli_ctx).virtual_machine_sizes.list(location))
+    from .operations.vm import VMListSizes
+    return VMListSizes(cli_ctx=cli_ctx)(command_args={
+        'location': location
+    })
 
 
 def _matched(pattern, string, partial_match=True):
diff --git a/src/azure-cli/azure/cli/command_modules/vm/_completers.py b/src/azure-cli/azure/cli/command_modules/vm/_completers.py
index d8052a4233b..78cd817b32d 100644
--- a/src/azure-cli/azure/cli/command_modules/vm/_completers.py
+++ b/src/azure-cli/azure/cli/command_modules/vm/_completers.py
@@ -21,7 +21,7 @@ def get_vm_size_completion_list(cmd, prefix, namespace):  # pylint: disable=unus
     if not location:
         location = get_one_of_subscription_locations(cmd.cli_ctx)
     result = get_vm_sizes(cmd.cli_ctx, location)
-    return [r.name for r in result]
+    return [r.get('name') for r in result]
 
 
 @Completer