diff --git a/plugins/FeedsProcessor.inc b/plugins/FeedsProcessor.inc
index 284439f..582de3a 100644
--- a/plugins/FeedsProcessor.inc
+++ b/plugins/FeedsProcessor.inc
@@ -821,9 +821,11 @@ abstract class FeedsProcessor extends FeedsPlugin {
     // source element and pass it to the processor's setTargetElement() to stick
     // it on the right place of the target item.
     foreach ($this->getMappings() as $mapping) {
-      $value = $this->getSourceValue($source, $result, $mapping['source']);
+      if (ma_importexport_dc_is_xml_importer($source->id) OR in_array(strtolower($mapping['source']), $result->input_fields)) {
+        $value = $this->getSourceValue($source, $result, $mapping['source']);

-      $this->mapToTarget($source, $mapping['target'], $target_item, $value, $mapping);
+        $this->mapToTarget($source, $mapping['target'], $target_item, $value, $mapping);
+      }
     }

     return $target_item;