diff --git a/python/tests/test_params.py b/python/tests/test_params.py
index 56492ada1..2d2ba2795 100644
--- a/python/tests/test_params.py
+++ b/python/tests/test_params.py
@@ -428,6 +428,11 @@ def test_validate_fails_on_both_id_and_vector(self):
         with pytest.raises(ValueError):
             vq._validate()
 
+    def test_validate_fails_on_both_id_and_numpy_vector(self):
+        vq = Query(field_name="test", id="doc123", vector=np.array([0.1]))
+        with pytest.raises(ValueError, match="Cannot provide both id and vector"):
+            vq._validate()
+
 
 class TestVectorQueryDeprecated:
     def test_deprecation_warning(self):
diff --git a/python/zvec/model/param/query.py b/python/zvec/model/param/query.py
index f2c15ecd2..7a3e7ec42 100644
--- a/python/zvec/model/param/query.py
+++ b/python/zvec/model/param/query.py
@@ -109,7 +109,7 @@ def has_fts(self) -> bool:
     def _validate(self) -> None:
         if self.field_name is None:
             raise ValueError("Field name cannot be empty")
-        if self.id and self.vector:
+        if self.has_id() and self.has_vector():
             raise ValueError("Cannot provide both id and vector")
         if self.has_fts() and (
             self.has_vector() or self.has_id() or self.param is not None