diff --git a/core/modules/rest/config/rest.schema.yml b/core/modules/rest/config/rest.schema.yml
index 6ea0b96..0bc9f7c 100644
--- a/core/modules/rest/config/rest.schema.yml
+++ b/core/modules/rest/config/rest.schema.yml
@@ -17,7 +17,7 @@ rest.routing:
           type: string
         "defaults":
           type: mapping
-           mapping:
+          mapping:
             "_controller":
               type: string
         "requirements":