apply_dissipation: fix sign for 3rd order dissipationcartoon

1 files changed, 1 insertions, 1 deletions

diff --git a/src/apply_dissipation.c b/src/apply_dissipation.c
index f550223..e5ff6ec 100644
--- a/src/apply_dissipation.c
+++ b/src/apply_dissipation.c
@@ -38,7 +38,7 @@ void apply_dissipation(const cGH *gh, const double *var, double *rhs, double dx[
         for (int k = 2; k < nk - 2; k++)
             for (int i = 2; i < nk - 2; i++) {
                 int idx   = CCTK_GFINDEX3D(gh, i, y_idx, k);
-                rhs[idx] += epsdis[idx] / 16.0 *
+                rhs[idx] -= epsdis[idx] / 16.0 *
                             ((var[idx - 2]           - 4.0 * var[idx - 1]            + 6.0 * var[idx] - 4.0 * var[idx + 1]           + var[idx + 2]) * inv_dx[0] +
                              (var[idx - 2 * ni * nj] - 4.0 * var[idx - 1 * ni * nj]  + 6.0 * var[idx] - 4.0 * var[idx + 1 * ni * nj] + var[idx + 2 * ni * nj]) * inv_dx[2]);
                 }