diff --git a/sbp/src/operators/upwind4.rs b/sbp/src/operators/upwind4.rs
index 5c17ffc..f5c38d5 100644
--- a/sbp/src/operators/upwind4.rs
+++ b/sbp/src/operators/upwind4.rs
@@ -388,7 +388,7 @@ impl<UO: UpwindOperator1d> UpwindOperator2d for (&UO, &Upwind4) {
             ([1, _], [1, _]) if prev.len_of(Axis(0)) % SimdT::lanes() == 0 => {
                 diss_simd_col(prev, fut);
             }
-            ([1, _], [1, _]) => diff_op_row(
+            ([1, _], [1, _]) => diff_op_col(
                 Upwind4::DISS_BLOCK,
                 Upwind4::DISS_DIAG,
                 super::Symmetry::Symmetric,