diff --git a/ts/smartlog.classes.smartlog.ts b/ts/smartlog.classes.smartlog.ts
index edbcdfb..26061af 100644
--- a/ts/smartlog.classes.smartlog.ts
+++ b/ts/smartlog.classes.smartlog.ts
@@ -40,7 +40,7 @@ export class Smartlog implements plugins.smartlogInterfaces.ILogDestination {
       const write = process.stdout.write;
       process.stdout.write = (...args: any) => {
         const logString: string = args[0];
-        if (!logString) {
+        if (!logString || typeof logString.startsWith !== 'function') {
           return;
         }
         if (!logString.startsWith('LOG') && typeof logString === 'string') {