diff --git a/amptheme/template.php b/amptheme/template.php
index e20c75b..650eea2 100644
--- a/amptheme/template.php
+++ b/amptheme/template.php
@@ -169,6 +169,9 @@ function amptheme_preprocess_field(&$variables) {
   // Remove RDF properties incompatible with AMP specification.
   $element = $variables['element'];
   foreach ($element['#items'] as $delta => $item) {
+    if (isset($variables['item_attributes_array'][$delta]['rel'])) {
+      unset($variables['item_attributes_array'][$delta]['rel']);
+    }
     if (isset($variables['item_attributes_array'][$delta]['rev'])) {
       unset($variables['item_attributes_array'][$delta]['rev']);
     }