diff --git a/inc/poche/WallabagEBooks.class.php b/inc/poche/WallabagEBooks.class.php
index 6656973..9dc545d 100644
--- a/inc/poche/WallabagEBooks.class.php
+++ b/inc/poche/WallabagEBooks.class.php
@@ -299,11 +299,9 @@ class WallabagPDF extends WallabagEbooks
 
         // set image scale factor
         $pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
-
-        
         
 
-        $pdf->Output($this->bookFileName, 'FD');
+        $pdf->Output($this->bookFileName . '.pdf', 'FD');
 
 	}
 }
\ No newline at end of file