diff --git a/admin/include/image.class.php b/admin/include/image.class.php
index 99e1e801c..67f02a1a8 100644
--- a/admin/include/image.class.php
+++ b/admin/include/image.class.php
@@ -638,12 +638,14 @@ class image_ext_imagick implements imageInterface
 
   function set_compression_quality($quality)
   {
+    global $conf;
+
     if ($this->is_animated_webp)
     {
       // in cas of animated WebP, we need to maximize quality to 70 to avoid
       // heavy thumbnails (or square or whatever is displayed on the thumbnails
       // page)
-      $quality = min($quality, 70);
+      $quality = min($quality, $conf['animated_webp_compression_quality']);
     }
 
     $this->add_command('quality', $quality);
diff --git a/include/config_default.inc.php b/include/config_default.inc.php
index 25b37b279..ebe5ac129 100644
--- a/include/config_default.inc.php
+++ b/include/config_default.inc.php
@@ -925,6 +925,10 @@ $conf['derivative_default_size'] = 'medium';
 // EXIF/IPTC... from derivative?
 $conf['derivatives_strip_metadata_threshold'] = 256000;
 
+// For animated webP files, to avoid heavy derivatives, set a specific quality,
+// different from derivatives.resize_quality
+$conf['animated_webp_compression_quality'] = 70;
+
 //Maximum Ajax requests at once, for thumbnails on-the-fly generation
 $conf['max_requests']=3;