diff --git a/spyne/interface/xml_schema/parser.py b/spyne/interface/xml_schema/parser.py
index 2b4db9212..ddd29c571 100644
--- a/spyne/interface/xml_schema/parser.py
+++ b/spyne/interface/xml_schema/parser.py
@@ -222,7 +222,7 @@ def process_includes(self, include):
             for inc in sub_schema.includes:
                 base_dir = dirname(file_name)
                 child_ctx = self.clone(base_dir=base_dir)
-                self.process_includes(inc)
+                child_ctx.process_includes(inc)
                 self.nsmap.update(child_ctx.nsmap)
                 self.prefmap = dict([(v, k) for k, v in self.nsmap.items()])