diff --git a/data/fields/structure_power.json b/data/fields/structure_power.json
index b90b9ce8..3a8e4063 100644
--- a/data/fields/structure_power.json
+++ b/data/fields/structure_power.json
@@ -1,5 +1,6 @@
 {
     "type": "combo",
+    "key": "structure",
     "label": "Structure",
     "strings": {
         "options": {