diff --git a/src/zeep/xsd/types/complex.py b/src/zeep/xsd/types/complex.py
index 9208e1a7..579f8cd0 100644
--- a/src/zeep/xsd/types/complex.py
+++ b/src/zeep/xsd/types/complex.py
@@ -151,6 +151,7 @@ def elements_nested(self):
                             [
                                 Any(
                                     max_occurs="unbounded",
+                                    min_occurs=0,
                                     restrict=self._array_type.array_type,
                                 )
                             ]