diff --git a/packages/rum/src/domain/rumEventsCollection/resource/matchRequestTiming.ts b/packages/rum/src/domain/rumEventsCollection/resource/matchRequestTiming.ts
index 2c7add5d78..783ab7f927 100644
--- a/packages/rum/src/domain/rumEventsCollection/resource/matchRequestTiming.ts
+++ b/packages/rum/src/domain/rumEventsCollection/resource/matchRequestTiming.ts
@@ -24,8 +24,13 @@ export function matchRequestTiming(request: RequestCompleteEvent) {
   if (!performance || !('getEntriesByName' in performance)) {
     return
   }
-  const candidates = performance
-    .getEntriesByName(request.url, 'resource')
+  const sameNameEntries = performance.getEntriesByName(request.url, 'resource')
+
+  if (!sameNameEntries.length || !('toJSON' in sameNameEntries[0])) {
+    return
+  }
+
+  const candidates = sameNameEntries
     .map((entry) => entry.toJSON() as RumPerformanceResourceTiming)
     .filter(toValidEntry)
     .filter((entry) => isBetween(entry, request.startTime, endTime(request)))