diff --git a/dune/solvers/iterationsteps/blockgsstep.hh b/dune/solvers/iterationsteps/blockgsstep.hh
index c18c54f46f574b9c19337de43e9f3ee228a745d3..ecf89f21609fd0fc89ae034c86aafbe2bc01efca 100644
--- a/dune/solvers/iterationsteps/blockgsstep.hh
+++ b/dune/solvers/iterationsteps/blockgsstep.hh
@@ -3,6 +3,8 @@
 #ifndef DUNE_BLOCK_GAUSS_SEIDEL_STEP_HH
 #define DUNE_BLOCK_GAUSS_SEIDEL_STEP_HH
 
+#warning This header is deprecated. Please use Dune::Solvers::BlockGSStep from blockgssteps.hh instead of ::BlockGSStep. See also gssteptest.cc for usage examples.
+
 #include <dune/common/bitsetvector.hh>
 
 #include "lineariterationstep.hh"