diff --git a/data/presets/emergency/water_tank.json b/data/presets/emergency/water_tank.json
index 657c400a..7544b3a1 100644
--- a/data/presets/emergency/water_tank.json
+++ b/data/presets/emergency/water_tank.json
@@ -5,7 +5,8 @@
         "ref",
         "operator",
         "water_tank/volume",
-        "drinking_water"
+        "drinking_water",
+        "building_area"
     ],
     "moreFields": [
         "covered",