diff --git a/code/GridFieldExternalLink.php b/code/GridFieldExternalLink.php
index 94c970b..0c0e282 100644
--- a/code/GridFieldExternalLink.php
+++ b/code/GridFieldExternalLink.php
@@ -59,7 +59,7 @@ class GridFieldExternalLink extends GridFieldDataColumns {
 	 */
 	public function getColumnContent($gridField, $record, $columnName) {
 		$data = new ArrayData(array(
-			'Link' => method_exists($record, 'getExternalLink') ? $record->getExternalLink() : $record->ExternalLink
+			'Link' => $record->hasMethod('getExternalLink') ? $record->getExternalLink() : $record->ExternalLink
 		));
 
 		return $data->renderWith('GridFieldExternalLink');