diff --git a/dune/tectonic/ellipticenergy.hh b/dune/tectonic/ellipticenergy.hh
index 97e44277e435b3f5463494da1eb0b44597615450..8359136afe258d1bb6ce1cd928edb89d39c1beb2 100644
--- a/dune/tectonic/ellipticenergy.hh
+++ b/dune/tectonic/ellipticenergy.hh
@@ -1,5 +1,5 @@
-#ifndef SAMPLE_FUNCTIONAL_HH
-#define SAMPLE_FUNCTIONAL_HH
+#ifndef ELLIPTIC_ENERGY_HH
+#define ELLIPTIC_ENERGY_HH
 
 #include <dune/common/fmatrix.hh>
 #include <dune/common/fvector.hh>