diff --git a/forms/gridfield/GridField.php b/forms/gridfield/GridField.php
index c18115514..ca9fa7f61 100644
--- a/forms/gridfield/GridField.php
+++ b/forms/gridfield/GridField.php
@@ -149,7 +149,7 @@ class GridField extends FormField {
 			return $this->modelClassName;
 		}
 
-		if($this->list && method_exists($this->list, 'dataClass')) {
+		if($this->list && $this->list->hasMethod('dataClass')) {
 			$class = $this->list->dataClass();
 
 			if($class) {