diff --git a/openpype/hosts/maya/plugins/publish/validate_xgen.py b/openpype/hosts/maya/plugins/publish/validate_xgen.py
index 442af794cd..bc25082aa8 100644
--- a/openpype/hosts/maya/plugins/publish/validate_xgen.py
+++ b/openpype/hosts/maya/plugins/publish/validate_xgen.py
@@ -16,7 +16,7 @@ class ValidateXgen(pyblish.api.InstancePlugin):
 
     def process(self, instance):
         # Validate only xgen collections are in objectset.
-        nodes = (
+        nodes = set(
             instance.data["xgenNodes"] +
             cmds.ls(instance, type="transform", long=True)
         )