diff --git a/src/qusi/internal/light_curve_transforms.py b/src/qusi/internal/light_curve_transforms.py
index 0f829fe..4977fb9 100644
--- a/src/qusi/internal/light_curve_transforms.py
+++ b/src/qusi/internal/light_curve_transforms.py
@@ -71,6 +71,8 @@ def make_uniform_length(example: np.ndarray, length: int) -> np.ndarray:
         )
     if example.shape[0] == length:
         pass
+    if example.shape[0] == 0:
+        example = np.array([-1], dtype=example.dtype)
     elif example.shape[0] > length:
         example = example[:length]
     else: