diff --git a/dune/solvers/norms/h1seminorm.hh b/dune/solvers/norms/h1seminorm.hh
index e7a4e9fb6b4313a9adc88f8deb1c7bd122dd637f..531ecdf03da74e02a5a134bd2c1652ecfd3ca849 100644
--- a/dune/solvers/norms/h1seminorm.hh
+++ b/dune/solvers/norms/h1seminorm.hh
@@ -8,6 +8,7 @@
 
 #include "norm.hh"
 
+//! Specialisation of the EnergyNorm class to identity blocks
 template<class VectorType>
 class H1SemiNorm : public Norm<VectorType>
 {