diff --git a/dune/fufem/assemblers/localassemblers/generalizedboundarymassassembler.hh b/dune/fufem/assemblers/localassemblers/generalizedboundarymassassembler.hh
index 9e9c5a7e4b5c00c25316220544aaa3d9f38c6469..4d6df544100848ebe0abb76e488d643ecb7c562f 100644
--- a/dune/fufem/assemblers/localassemblers/generalizedboundarymassassembler.hh
+++ b/dune/fufem/assemblers/localassemblers/generalizedboundarymassassembler.hh
@@ -1,7 +1,7 @@
 // -*- tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set ts=8 sw=4 et sts=4:
-#ifndef GENERALIZED_BOUNDARY_MASS_ASSEMBLER_HH
-#define GENERALIZED_BOUNDARY_MASS_ASSEMBLER_HH
+#ifndef DUNE_FUFEM_ASSEMBLERS_LOCALASSEMBLERS_GENERALIZED_BOUNDARY_MASS_ASSEMBLER_HH
+#define DUNE_FUFEM_ASSEMBLERS_LOCALASSEMBLERS_GENERALIZED_BOUNDARY_MASS_ASSEMBLER_HH
 
 
 #include <dune/common/function.hh>