diff --git a/dune/solvers/solvers/iterativesolver.hh b/dune/solvers/solvers/iterativesolver.hh
index 11510c705a75515d49389cbd5f221feda2b9cc03..5b0452f0f0c8f3db298dd0ce03a91e29b13c3897 100644
--- a/dune/solvers/solvers/iterativesolver.hh
+++ b/dune/solvers/solvers/iterativesolver.hh
@@ -1,5 +1,5 @@
-#ifndef ITERATIVE_SOLVER_HH
-#define ITERATIVE_SOLVER_HH
+#ifndef DUNE_SOLVERS_ITERATIVE_SOLVER_HH
+#define DUNE_SOLVERS_ITERATIVE_SOLVER_HH
 
 #include <dune/solvers/solvers/solver.hh>
 #include <dune/solvers/iterationsteps/iterationstep.hh>