diff --git a/dune/matrix-vector/traits/matrixtraits.hh b/dune/matrix-vector/traits/matrixtraits.hh
index 9d53fae5e766ff019b037c49e92261f474519051..ead971ed7948de79f066d285f6f37362c362d63c 100644
--- a/dune/matrix-vector/traits/matrixtraits.hh
+++ b/dune/matrix-vector/traits/matrixtraits.hh
@@ -19,8 +19,6 @@ namespace Traits {
 template<class T>
 struct MatrixTraits {
   constexpr static bool isMatrix = false;
-  constexpr static int rows = -1;
-  constexpr static int cols = -1;
 };
 
 template<class T, int n, int m>