diff --git a/node_link_style.module b/node_link_style.module
index 888d988..52ad52f 100644
--- a/node_link_style.module
+++ b/node_link_style.module
@@ -126,7 +126,9 @@ function node_link_style_item_load($name) {
  */
 function node_link_style_preprocess_node(&$variables) {
   if ($plugin = context_get_plugin('reaction', 'node_link_style')) {
-    $variables['links'] = $plugin->execute($variables['node']->links);
+    if (NULL !== ($links = $plugin->execute($variables['node']->links))) {
+      $variables['links'] = $links;
+    }
   }
 }