diff --git a/src/calng/Gotthard2Assembler.py b/src/calng/Gotthard2Assembler.py
index 02cb59e520d0c7a6132e0f6939331c817fca73a8..121688563163637a7202bc83a50fdccf4cf859c1 100644
--- a/src/calng/Gotthard2Assembler.py
+++ b/src/calng/Gotthard2Assembler.py
@@ -37,6 +37,13 @@ class Gotthard2Assembler(TrainMatcher.TrainMatcher):
             .dataSchema(schemas.preview_schema(wrap_image_in_imagedata=False))
             .commit(),
 
+            STRING_ELEMENT(expected)
+            .key("managerDevice")
+            .displayedName("Manager device")
+            .assignmentInternal()
+            .defaultValue("")
+            .commit(),
+
             STRING_ELEMENT(expected)
             .key("geometryDevice")
             .displayedName("[Unused] Geometry device")