diff --git a/tools/find-inactive-tsc.mjs b/tools/find-inactive-tsc.mjs
index 741fb0c0b96c49..871ca9af1ed9d2 100755
--- a/tools/find-inactive-tsc.mjs
+++ b/tools/find-inactive-tsc.mjs
@@ -13,7 +13,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import readline from 'node:readline';
 
-const SINCE = +process.argv[2] || '3 months ago';
+const SINCE = process.argv[2] || '3 months ago';
 
 async function runGitCommand(cmd, options = {}) {
   const childProcess = cp.spawn('/bin/sh', ['-c', cmd], {