diff --git a/modules/services/taginfo.js b/modules/services/taginfo.js
index 8d1a630b8..7d4f6a410 100644
--- a/modules/services/taginfo.js
+++ b/modules/services/taginfo.js
@@ -313,7 +313,7 @@ export default {
                 // A few OSM keys expect values to contain uppercase values (see #3377).
                 // This is not an exhaustive list (e.g. `name` also has uppercase values)
                 // but these are the fields where taginfo value lookup is most useful.
-                var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
+                var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery|cai_scale/;
                 var allowUpperCase = re.test(params.key);
                 var f = filterValues(allowUpperCase);