diff --git a/src/aliby/tile/tiler.py b/src/aliby/tile/tiler.py
index a6ca276b97b7addb090e0b836c4a25c9e9c994ef..f1db705c5ba6edb0d5ef4300edb4ba1c05c8ca2e 100644
--- a/src/aliby/tile/tiler.py
+++ b/src/aliby/tile/tiler.py
@@ -265,8 +265,8 @@ class Tiler(StepABC):
             "size_c": dummy_image.shape[1],
             "size_t": dummy_image.shape[0],
             "channels": [
-                parameters["ref_channel"],
                 *(["nil"] * (dummy_image.shape[1] - 1)),
+                parameters["ref_channel"],
             ],
             "name": " ",
         }