diff --git a/core/modules/field/field.attach.inc b/core/modules/field/field.attach.inc
index 9e17d96..d267546 100644
--- a/core/modules/field/field.attach.inc
+++ b/core/modules/field/field.attach.inc
@@ -265,7 +265,7 @@ function field_invoke_method_multiple($method, $target_function, array $entities
       // Let the closure determine the target object on which the method should
       // be called.
       if (empty($grouped_targets[$instance_id])) {
-        $grouped_targets[$instance_id] = $target_function($instance);
+        $grouped_targets[$instance_id] = call_user_func($target_function, $instance);
       }
 
       if (method_exists($grouped_targets[$instance_id], $method)) {