diff --git a/lib/internal/v8_prof_processor.js b/lib/internal/v8_prof_processor.js
index a39fbf4743e76f..7a942d3225a2a9 100644
--- a/lib/internal/v8_prof_processor.js
+++ b/lib/internal/v8_prof_processor.js
@@ -18,7 +18,7 @@ const scriptFiles = [
   'internal/deps/v8/tools/SourceMap',
   'internal/deps/v8/tools/tickprocessor-driver'
 ];
-var script = '';
+let script = '';
 
 scriptFiles.forEach((s) => {
   script += internalBinding('natives')[s] + '\n';