diff --git a/src/mx_bluesky/I24/serial/parameters/utils.py b/src/mx_bluesky/I24/serial/parameters/utils.py
index a91456914..f0ab4f3d2 100644
--- a/src/mx_bluesky/I24/serial/parameters/utils.py
+++ b/src/mx_bluesky/I24/serial/parameters/utils.py
@@ -31,5 +31,5 @@ def get_chip_format(chip_type: ChipType) -> ChipDescription:
             defaults["y_step_size"] = float(caget(pv.me14e_gp99))
             defaults["x_blocks"] = defaults["y_blocks"] = 1
             defaults["b2b_horz"] = defaults["b2b_vert"] = 0.0
-    chip_params = {"chip_type": chip_type.value, **defaults}  # type: ignore
+    chip_params = {"chip_type": chip_type, **defaults}  # type: ignore
     return ChipDescription(**chip_params)