diff --git a/dune/solvers/common/numproc.hh b/dune/solvers/common/numproc.hh
index 3cf99bad2111855b39ee34a6a47f64c013b4cb6d..94ea58b050876bd80a15ca3fe92e727f4e2a5f3a 100644
--- a/dune/solvers/common/numproc.hh
+++ b/dune/solvers/common/numproc.hh
@@ -1,7 +1,7 @@
 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 // vi: set et ts=4 sw=2 sts=2:
-#ifndef DUNE_NUMPROC_HH
-#define DUNE_NUMPROC_HH
+#ifndef DUNE_SOLVERS_COMMON_NUMPROC_HH
+#define DUNE_SOLVERS_COMMON_NUMPROC_HH
 
 #include <dune/common/exceptions.hh>
 #include <dune/common/parametertree.hh>