diff --git a/dune/solvers/iterationsteps/semidefiniteblockgsstep.hh b/dune/solvers/iterationsteps/semidefiniteblockgsstep.hh
index b9f434c2115a5ecf80aafb9dbd0e5e573d1af395..fe6dbe44e15ea47abe9a84cb4c13be3071705fc7 100644
--- a/dune/solvers/iterationsteps/semidefiniteblockgsstep.hh
+++ b/dune/solvers/iterationsteps/semidefiniteblockgsstep.hh
@@ -1,5 +1,5 @@
-#ifndef SEMIDEFINITEBLOCKGSSTEP_HH
-#define SEMIDEFINITEBLOCKGSSTEP_HH
+#ifndef DUNE_SOLVERS_ITERATIONSTEPS_SEMIDEFINITEBLOCKGSSTEP_HH
+#define DUNE_SOLVERS_ITERATIONSTEPS_SEMIDEFINITEBLOCKGSSTEP_HH
 
 #include <cmath>
 #include <algorithm>
@@ -236,4 +236,4 @@ std::istream& operator>>(std::istream& lhs, typename SemiDefiniteBlockGSStep<M,
 */
 
 
-#endif // SEMIDEFINITEBLOCKGSSTEP_HH
+#endif // DUNE_SOLVERS_ITERATIONSTEPS_SEMIDEFINITEBLOCKGSSTEP_HH