diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer_Peggy/helpers.ts b/packages/squiggle-lang/src/rescript/Reducer/Reducer_Peggy/helpers.ts
index 10b22fab..57b85f9e 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer_Peggy/helpers.ts
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer_Peggy/helpers.ts
@@ -94,6 +94,7 @@ type NodeKeyValue = {
 type NodeString = {
   type: "String";
   value: string;
+  location?: LocationRange;
 };
 
 type NodeBoolean = {