diff --git a/dune/subgrid/subgrid/subgridindexstorage.hh b/dune/subgrid/subgrid/subgridindexstorage.hh
index 9ff1e5d581b88512497ee47e2ade9dd08acbd0cf..713c8c6a2449602bedeab82b57136e7be73ec44a 100644
--- a/dune/subgrid/subgrid/subgridindexstorage.hh
+++ b/dune/subgrid/subgrid/subgridindexstorage.hh
@@ -965,10 +965,10 @@ template <class GridType>
 class SubGridVectorIndexStorage :
     public SubGridIndexStorageBase<GridType>
 {
-    template <class GridImp_, int EntityDim>
-    friend class SubGridVectorSubindexSetter;
+        template <class GridImp_, int EntityDim>
+        friend class SubGridVectorSubindexSetter;
 
-    using Base = SubGridIndexStorageBase<GridType>;
+        using Base = SubGridIndexStorageBase<GridType>;
 
     public: