diff --git a/src/PdfBuilder.php b/src/PdfBuilder.php
index 309a066..036c5d4 100755
--- a/src/PdfBuilder.php
+++ b/src/PdfBuilder.php
@@ -137,7 +137,7 @@ public function footerHtml(string $html): self
 
     public function download(?string $downloadName = null): self
     {
-        $this->downloadName ?? $this->name($downloadName ?? 'download');
+        $this->downloadName ?: $this->name($downloadName ?? 'download');
 
         $this->addHeaders([
             'Content-Type' => 'application/pdf',