diff --git a/dune/gfe/averageinterface.hh b/dune/gfe/averageinterface.hh
index 481cdc424c40482965a291bb821911514888821c..78e04f2c55ce9a730a8d830118da1bca772eedc9 100644
--- a/dune/gfe/averageinterface.hh
+++ b/dune/gfe/averageinterface.hh
@@ -7,6 +7,7 @@
 #include <dune/common/fmatrix.hh>
 #include <dune/localfunctions/lagrange/pqkfactory.hh>
 #include <dune/istl/solvers.hh>
+#include <dune/istl/preconditioners.hh>
 
 #include <dune/fufem/dgindexset.hh>
 #include <dune/fufem/crossproduct.hh>