diff --git a/src/jdk.jfr/share/classes/jdk/jfr/internal/instrument/RandomAccessFileInstrumentor.java b/src/jdk.jfr/share/classes/jdk/jfr/internal/instrument/RandomAccessFileInstrumentor.java
index aa05bb3c4eb..5a82cea978d 100644
--- a/src/jdk.jfr/share/classes/jdk/jfr/internal/instrument/RandomAccessFileInstrumentor.java
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/instrument/RandomAccessFileInstrumentor.java
@@ -158,7 +158,7 @@ final class RandomAccessFileInstrumentor {
             write(b);
             bytesWritten = b.length;
         } finally {
-            long duration = EventConfiguration.timestamp();
+            long duration = EventConfiguration.timestamp() - start;
             if (eventConfiguration.shouldCommit(duration)) {
                 FileWriteEvent.commit(start, duration, path, bytesWritten);
             }