diff --git a/src/performanceMark.ts b/src/performanceMark.ts
index 4b3fdfbe..fd25d8d8 100644
--- a/src/performanceMark.ts
+++ b/src/performanceMark.ts
@@ -53,7 +53,7 @@ export const performanceMeasure = (
   // we don't want to crash due to reporting, so we'll polyfill instead
   try {
     const measure = performance.measure(measureName, {
-      start: startMark.startTime,
+      start: startMark.startTime + startMark.duration,
       end,
     })