diff --git a/src/timestepping.hh b/src/timestepping.hh
index 0d417727babaeecd2243ab0551b43463ecb232c2..f38296c514e30d22bf0b22b74ad8b33698a292a8 100644
--- a/src/timestepping.hh
+++ b/src/timestepping.hh
@@ -1,5 +1,6 @@
 #ifndef DUNE_TECTONIC_TIMESTEPPING_HH
 #define DUNE_TECTONIC_TIMESTEPPING_HH
+
 #include <dune/common/bitsetvector.hh>
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>