diff --git a/lib/thumbs.class.php b/lib/thumbs.class.php
index 89880c2..0de9890 100644
--- a/lib/thumbs.class.php
+++ b/lib/thumbs.class.php
@@ -39,7 +39,7 @@ class thumb {
   public function get_thumb($iname) {
     $src     = $this->imagedir.$iname;
     $ext     = pathinfo($iname, PATHINFO_EXTENSION);
-    $dstname = hash('sha256', $iname);
+    $dstname = hash('sha256', $src);
     $dstpath = $this->thumbdir.$dstname.'.'.$ext;