diff --git a/explorer/ExplorerProgram.ts b/explorer/ExplorerProgram.ts
index 5d82ce4f2b..ead964eeb1 100644
--- a/explorer/ExplorerProgram.ts
+++ b/explorer/ExplorerProgram.ts
@@ -18,8 +18,8 @@ import {
     PromiseCache,
     SerializedGridProgram,
     trimObject,
-    mergeGrapherConfigs,
     merge,
+    isEmpty,
 } from "@ourworldindata/utils"
 import {
     CellDef,