diff --git a/admin/code/ModelAdmin.php b/admin/code/ModelAdmin.php
index e2b91e185..3f35a7d2e 100644
--- a/admin/code/ModelAdmin.php
+++ b/admin/code/ModelAdmin.php
@@ -354,7 +354,7 @@ 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,