diff --git a/includes/resourceloader/ResourceLoaderUserOptionsModule.php b/includes/resourceloader/ResourceLoaderUserOptionsModule.php
index 0c332cff8d3..a15d310bcd5 100644
--- a/includes/resourceloader/ResourceLoaderUserOptionsModule.php
+++ b/includes/resourceloader/ResourceLoaderUserOptionsModule.php
@@ -64,6 +64,14 @@ class ResourceLoaderUserOptionsModule extends ResourceLoaderModule {
 		return false;
 	}
 
+	/**
+	 * @param ResourceLoaderContext $context
+	 * @return bool
+	 */
+	public function isKnownEmpty( ResourceLoaderContext $context ) {
+		return !$context->getUserObj()->getOptions( User::GETOPTIONS_EXCLUDE_DEFAULTS );
+	}
+
 	/**
 	 * @return string
 	 */