diff --git a/search.php b/search.php
index 31d7dc0..ae7745b 100644
--- a/search.php
+++ b/search.php
@@ -21,7 +21,8 @@ get_header(); ?>
 					<?php /* Start the Loop */ ?>
 					<?php while ( have_posts() ) : the_post();?>
 						<?php
-							$url = get_field('external_url');
+							$url = '';
+							if(function_exists('get_field')) $url = get_field('external_url');
 							if( empty($url) ){
 								$url = '<a href="'.get_permalink().'">';
 							}else{