diff --git a/src/utils/usageIndex.ts b/src/utils/usageIndex.ts
index 34ebb9d..632f9f5 100644
--- a/src/utils/usageIndex.ts
+++ b/src/utils/usageIndex.ts
@@ -41,7 +41,9 @@ export function collectUsageDetailsForCandidates(
     if (!merged) {
       merged = [...firstDetails];
     }
-    details.forEach((detail) => merged.push(detail));
+    for (const detail of details) {
+      merged.push(detail);
+    }
   }
 
   return merged ?? firstDetails ?? EMPTY_USAGE_DETAILS;