diff --git a/dune/istl/multitypeblockmatrix.hh b/dune/istl/multitypeblockmatrix.hh
index 0a856b4392bdc8c544e4ee325359cdb63e18dc01..2477e157474e136c36b6212bef58f6231b7945ab 100644
--- a/dune/istl/multitypeblockmatrix.hh
+++ b/dune/istl/multitypeblockmatrix.hh
@@ -404,6 +404,18 @@ namespace Dune {
 
   };
 
+
+  /** @addtogroup DenseMatVec
+      @{
+   */
+  template <typename... Rows>
+  struct FieldTraits< MultiTypeBlockMatrix<Rows...> >
+  {
+    using field_type = typename MultiTypeBlockMatrix<Rows...>::field_type;
+    using real_type  = typename FieldTraits<field_type>::real_type;
+  };
+
+
   /**
      @brief << operator for a MultiTypeBlockMatrix