diff --git a/src/EncodedImage.php b/src/EncodedImage.php
index b7691860..fa01f656 100644
--- a/src/EncodedImage.php
+++ b/src/EncodedImage.php
@@ -7,6 +7,7 @@ use Intervention\Image\Exceptions\NotWritableException;
 class EncodedImage
 {
     protected $data;
+    protected $mimetype;
 
     public function __construct(string $data)
     {
@@ -23,6 +24,11 @@ class EncodedImage
         }
     }
 
+    public function toDataUrl(): string
+    {
+        return '';
+    }
+
     public function __toString(): string
     {
         return $this->data;