diff --git a/ci/build_cpp.sh b/ci/build_cpp.sh
index 899cd80bec..2083839cb2 100755
--- a/ci/build_cpp.sh
+++ b/ci/build_cpp.sh
@@ -90,7 +90,7 @@ else
         cd build
         cmake -G "${CMAKE_GENERATOR:-Ninja}" \
               -DCMAKE_INSTALL_PREFIX="$MAGISTRATE_BUILD/install" \
-              -Dkokkos_DIR="$KOKKOS_INSTALL" \
+              -DKokkos_ROOT="$KOKKOS_INSTALL" \
               "$CHECKPOINT"
         cmake --build . ${dashj} --target install
     fi