diff --git a/lib/internal/v8_prof_processor.js b/lib/internal/v8_prof_processor.js
index 95b6254599..105ca30b12 100644
--- a/lib/internal/v8_prof_processor.js
+++ b/lib/internal/v8_prof_processor.js
@@ -18,7 +18,7 @@ scriptFiles.forEach(function(s) {
   script += process.binding('natives')[s] + '\n';
 });
 
-var tickArguments = [];
+const tickArguments = [];
 if (process.platform === 'darwin') {
   tickArguments.push('--mac');
 } else if (process.platform === 'win32') {