diff --git a/feeds_tamper.module b/feeds_tamper.module
index 350857bb1..9814e07d3 100644
--- a/feeds_tamper.module
+++ b/feeds_tamper.module
@@ -48,6 +48,10 @@ function feeds_tamper_feeds_after_parse(FeedsSource $source, FeedsParserResult $
         $element_key = drupal_strtolower($element_key);
       }
 
+      if (!isset($result->items[$item_key][$element_key])){
+        continue;
+      }
+
       // Manually advance the current_item key since we can't use shiftItem().
       // Plugins can change it, so re-set.
       $result->current_item = $result->items[$item_key];