diff --git a/src/whatsapp/services/whatsapp.service.ts b/src/whatsapp/services/whatsapp.service.ts
index 5204f881..de916b31 100644
--- a/src/whatsapp/services/whatsapp.service.ts
+++ b/src/whatsapp/services/whatsapp.service.ts
@@ -2321,7 +2321,7 @@ export class WAStartupService {
       let mimetype: string;
 
       // novo critério para adotar mimetype quando nao está presente na url e no filename - inicio
-      if (isURL(mediaMessage.media) || mediaMessage.fileName) {
+      if (isURL(mediaMessage.media) || mediaMessage.fileName !== "") {
       if (isURL(mediaMessage.media)) {
         mimetype = getMIMEType(mediaMessage.media);
       } else {