diff --git a/public/app/plugins/datasource/opentsdb/query_ctrl.ts b/public/app/plugins/datasource/opentsdb/query_ctrl.ts
index 43096b2ec36..c973bd3a223 100644
--- a/public/app/plugins/datasource/opentsdb/query_ctrl.ts
+++ b/public/app/plugins/datasource/opentsdb/query_ctrl.ts
@@ -38,7 +38,7 @@ export class OpenTsQueryCtrl extends QueryCtrl {
       this.target.downsampleFillPolicy = 'none';
     }
 
-    this.datasource.getAggregators().then(function(aggs) {
+    this.datasource.getAggregators().then((aggs) => {
       this.aggregators = aggs;
     });