diff --git a/dune/solvers/solvers/tcgsolver.hh b/dune/solvers/solvers/tcgsolver.hh
index ef841a90a2a924bdcfe9a60da87f6f3b810dd1ff..b2fd114d216a8363485ea61d69e4c0a96ab9fa28 100644
--- a/dune/solvers/solvers/tcgsolver.hh
+++ b/dune/solvers/solvers/tcgsolver.hh
@@ -1,5 +1,5 @@
-#ifndef TRUNCATED_CG_SOLVER_HH
-#define TRUNCATED_CG_SOLVER_HH
+#ifndef DUNE_SOLVERS_SOLVERS_TCGSOLVER_HH
+#define DUNE_SOLVERS_SOLVERS_TCGSOLVER_HH
 
 #include <cmath>