diff --git a/sites/all/modules/imageapi/imageapi.module b/sites/all/modules/imageapi/imageapi.module
index 2021dc2..6aed013 100644
--- a/sites/all/modules/imageapi/imageapi.module
+++ b/sites/all/modules/imageapi/imageapi.module
@@ -162,6 +162,8 @@ function imageapi_toolkit_invoke($method, &$image, array $params = array()) {
   $function = $image->toolkit . '_image_' . $method;
   if (function_exists($function)) {
     array_unshift($params, $image);
+    $params[0] = &$image;
+    $params[1] = &$params[1];
     return call_user_func_array($function, $params);
   }
   watchdog('imageapi', 'The selected image handling toolkit %toolkit can not correctly process %function.', array('%toolkit' => $image->toolkit, '%function' => $function), WATCHDOG_ERROR);