Merge pull request #17872 from masterleinad/fix_sundials_7

diff --git a/include/deal.II/sundials/n_vector.templates.h b/include/deal.II/sundials/n_vector.templates.h
index 7671ea7d120cbfab1d766821335bb13fbf29e3d2..24680e569aebbee3ada137c2ca3ec8992c9624a1 100644 (file)
--- a/include/deal.II/sundials/n_vector.templates.h
+++ b/include/deal.II/sundials/n_vector.templates.h
@@ -753,7 +753,7 @@ namespace SUNDIALS
           //
           // Further, we need to cast away const here, as SUNDIALS demands the
           // communicator by value.
-          return const_cast<SUNComm>(get_communicator<VectorType>(v));
+          return const_cast<SUNComm &>(get_communicator<VectorType>(v));
         else
           return SUN_COMM_NULL;
 #    endif