diff --git a/plugins/FeedsProcessor.inc b/plugins/FeedsProcessor.inc
index e42928c..fa9d8b1 100755
--- a/plugins/FeedsProcessor.inc
+++ b/plugins/FeedsProcessor.inc
@@ -737,11 +737,8 @@ abstract class FeedsProcessor extends FeedsPlugin {
    *   The mapping configuration.
    */
   protected function invokePreprocessCallbacks(array $callbacks, FeedsSource $source, $target_item, $target, array &$mapping) {
-    if (!is_array($values)) {
-      $values = array($values);
-    }
     foreach ($callbacks as $callback) {
-      $callback($source, $target_item, $target, $values, $mapping);
+      $callback($source, $target_item, $target, $mapping);
     }
   }