diff --git a/src/Model/Geometry/ProfileXYZ.py b/src/Model/Geometry/ProfileXYZ.py
index 0ac4fe85..042bf99f 100644
--- a/src/Model/Geometry/ProfileXYZ.py
+++ b/src/Model/Geometry/ProfileXYZ.py
@@ -39,9 +39,9 @@ logger = logging.getLogger()
 
 @dataclass
 class Tabulation:
-    z: np.array([])
-    A: np.array([])
-    L: np.array([])
+    z: np.ndarray
+    A: np.ndarray
+    L: np.ndarray
 
 
 class ProfileXYZ(Profile, SQLSubModel):