diff --git a/dune/solvers/common/canignore.hh b/dune/solvers/common/canignore.hh
index f1cc4ca3ebe12a0683dc95dddda92260997fea91..8dafbf9762ac89c0c2b069163f0dc8ba868ba75f 100644
--- a/dune/solvers/common/canignore.hh
+++ b/dune/solvers/common/canignore.hh
@@ -1,6 +1,9 @@
 #ifndef CAN_IGNORE_HH
 #define CAN_IGNORE_HH
 
+/** \brief Abstract base class for solvers and iterationsteps that are
+ *      able to ignore degrees of freedom described by a bit field.
+ */
 template <class BitVectorType>
 class CanIgnore
 {