diff --git a/dune/istl/operators.hh b/dune/istl/operators.hh
index b4ca5dba00841ad146c492624ecd5c73ae9818b2..d978c977b44b3e49679c5cacfc85a14020df8ac5 100644
--- a/dune/istl/operators.hh
+++ b/dune/istl/operators.hh
@@ -10,6 +10,7 @@
 #include <string>
 
 #include <dune/common/exceptions.hh>
+#include <dune/common/shared_ptr.hh>
 
 #include "solvercategory.hh"