diff --git a/admin/code/ModelAdmin.php b/admin/code/ModelAdmin.php
index 2bb77ab5b..715132fa2 100644
--- a/admin/code/ModelAdmin.php
+++ b/admin/code/ModelAdmin.php
@@ -366,7 +366,7 @@ abstract class ModelAdmin extends LeftAndMain {
 			$specRelations->push(new ArrayData(array('Name' => $name, 'Description' => $desc)));
 		}
 		$specHTML = $this->customise(array(
-			'ClassName' => str_replace('\\', '_', $className),
+			'ClassName' => $this->sanitiseClassName($this->modelClass),
 			'ModelName' => Convert::raw2att($modelName),
 			'Fields' => $specFields,
 			'Relations' => $specRelations,