From 039616d1e3c5576dc993cdf5008cef691dd602a8 Mon Sep 17 00:00:00 2001
From: Nathan Ellingwood <ndellin@sandia.gov>
Date: Fri, 21 Nov 2025 16:18:14 -0700
Subject: [PATCH] tpetra: fix ArithTraits namespace for kokkos@5.0

Signed-off-by: Nathan Ellingwood <ndellin@sandia.gov>
---
 packages/tpetra/core/src/Tpetra_CrsMatrix_def.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/tpetra/core/src/Tpetra_CrsMatrix_def.hpp b/packages/tpetra/core/src/Tpetra_CrsMatrix_def.hpp
index f50bd9e7a93e..c77d4e4696f9 100644
--- a/packages/tpetra/core/src/Tpetra_CrsMatrix_def.hpp
+++ b/packages/tpetra/core/src/Tpetra_CrsMatrix_def.hpp
@@ -8930,7 +8930,11 @@ void copyAndPermuteStaticGraphNew(
   using LO = LocalOrdinal;
   using GO = GlobalOrdinal;
 
+#if KOKKOS_VERSION >= 40799
+  using impl_scalar_type = typename KokkosKernels::ArithTraits<Scalar>::val_type;
+#else
   using impl_scalar_type = typename Kokkos::ArithTraits<Scalar>::val_type;
+#endif
 
   using crs_matrix_type = CrsMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node>;