diff --git a/admin/include/image.class.php b/admin/include/image.class.php
index 499fcbbea..410a2dd05 100644
--- a/admin/include/image.class.php
+++ b/admin/include/image.class.php
@@ -559,6 +559,11 @@ class image_ext_imagick implements imageInterface
 
   function rotate($rotation)
   {
+    if (empty($rotation))
+    {
+      return true;
+    }
+
     if ($rotation==90 || $rotation==270)
     {
       $tmp = $this->width;