diff --git a/docarray/index/backends/qdrant.py b/docarray/index/backends/qdrant.py
index aa0d49095e..6f1330f9ea 100644
--- a/docarray/index/backends/qdrant.py
+++ b/docarray/index/backends/qdrant.py
@@ -269,7 +269,7 @@ def python_type_to_db_type(self, python_type: Type) -> Any:
         :param python_type: a python type.
         :return: the corresponding database column type.
         """
-        if any(issubclass(python_type, vt) for vt in QDRANT_PY_VECTOR_TYPES):
+        if any(safe_issubclass(python_type, vt) for vt in QDRANT_PY_VECTOR_TYPES):
             return 'vector'
 
         if safe_issubclass(python_type, docarray.typing.id.ID):
diff --git a/tests/index/qdrant/test_configurations.py b/tests/index/qdrant/test_configurations.py
index d17ebbbdeb..93aed2dfe0 100644
--- a/tests/index/qdrant/test_configurations.py
+++ b/tests/index/qdrant/test_configurations.py
@@ -1,3 +1,5 @@
+from typing import List
+
 import numpy as np
 import pytest
 from pydantic import Field
@@ -7,7 +9,6 @@
 from docarray.typing import NdArray
 from tests.index.qdrant.fixtures import start_storage, tmp_collection_name  # noqa: F401
 
-
 pytestmark = [pytest.mark.slow, pytest.mark.index]
 
 
@@ -44,3 +45,12 @@ class Schema(BaseDoc):
 
     index3 = QdrantDocumentIndex[Schema](collection_name='my_index')
     assert index3.index_name == 'my_index'
+
+
+def test_index_with_non_class_type():
+    class Schema(BaseDoc):
+        tens: NdArray = Field(dim=10)
+        list_field: List
+
+    index = QdrantDocumentIndex[Schema]()
+    assert index.num_docs() == 0