diff --git a/src/v1/parsing/common/summaryHelper.ts b/src/v1/parsing/common/summaryHelper.ts
index 36a16a3f..f511190e 100644
--- a/src/v1/parsing/common/summaryHelper.ts
+++ b/src/v1/parsing/common/summaryHelper.ts
@@ -54,7 +54,7 @@ export function floatToString(value: number|null) {
   if (value === null){
     return "";
   }
-  return value.toLocaleString(undefined, {
+  return value.toLocaleString("en-US", {
     minimumFractionDigits: 2,
     maximumFractionDigits: 5,
     useGrouping: false,