diff --git a/spec.ts b/spec.ts
index 955aa37..380d515 100644
--- a/spec.ts
+++ b/spec.ts
@@ -412,7 +412,7 @@ interface ConfigOptions {
 }
 
 export function renderConfig(options: ConfigOptions) {
-    return `# Rendered from TypeScript, do not edit!\n\n\n` + specTemplate
+    return `# Rendered from TypeScript ${new Date().toLocaleString()}, do not edit!\n\n\n` + specTemplate
         .replace("@@GCCDIR@@", options.gccdir)
         .replace("@@OPTIMIZE@@", options.optimize);
 }