diff --git a/mappers/taxonomy.inc b/mappers/taxonomy.inc
index 8925ad2..a1d5fe6 100644
--- a/mappers/taxonomy.inc
+++ b/mappers/taxonomy.inc
@@ -68,6 +68,7 @@ function taxonomy_feeds_processor_targets($entity_type, $bundle_name) {
         'description' => t('The @label field of the entity.', array('@label' => $instance['label'])),
         'summary_callback' => array('taxonomy_feeds_summary_callback'),
         'form_callback' => array('taxonomy_feeds_form_callback'),
+        'preprocess_callback' => array('taxonomy_feeds_preprocess_callback'),
       );
     }
   }
@@ -80,17 +81,22 @@ function taxonomy_feeds_processor_targets($entity_type, $bundle_name) {
 }
 
 /**
- * Callback for mapping. Here is where the actual mapping happens.
- *
- * @todo Do not create new terms for non-autotag fields.
+ * Callback for processing the mapping array.
  */
-function taxonomy_feeds_set_target($source, $entity, $target, array $terms, $mapping = array()) {
+function taxonomy_feeds_preprocess_callback(FeedsSource $source, $entity, $target, array $terms, array &$mapping) {
   // Add in default values.
   $mapping += array(
     'term_search' => FEEDS_TAXONOMY_SEARCH_TERM_NAME,
     'autocreate' => FALSE,
   );
+}
 
+/**
+ * Callback for mapping. Here is where the actual mapping happens.
+ *
+ * @todo Do not create new terms for non-autotag fields.
+ */
+function taxonomy_feeds_set_target($source, $entity, $target, array $terms, $mapping = array()) {
   $info = field_info_field($target);
 
   $cache = &drupal_static(__FUNCTION__);
diff --git a/plugins/FeedsProcessor.inc b/plugins/FeedsProcessor.inc
index 5b1bcbe..5dc3f36 100755
--- a/plugins/FeedsProcessor.inc
+++ b/plugins/FeedsProcessor.inc
@@ -669,6 +669,12 @@ abstract class FeedsProcessor extends FeedsPlugin {
           $value = array($value);
         }
 
+        if (!empty($mapping['preprocess_callback'])) {
+          foreach ($mapping['preprocess_callback'] as $preprocess) {
+            $preprocess($source, $target_item, $mapping['target'], $value, $mapping);
+          }
+        }
+
         $callback($source, $target_item, $mapping['target'], $value, $mapping);
       }
       else {