diff --git a/source/blender/blenkernel/intern/subdiv_mesh.cc b/source/blender/blenkernel/intern/subdiv_mesh.cc
index fa4a08a178d..acc0404b005 100644
--- a/source/blender/blenkernel/intern/subdiv_mesh.cc
+++ b/source/blender/blenkernel/intern/subdiv_mesh.cc
@@ -1192,7 +1192,8 @@ Mesh *BKE_subdiv_to_mesh(Subdiv *subdiv,
     BitVector<> &bit_vector = result->runtime->subsurf_optimal_display_edges;
     bit_vector.clear();
     bit_vector.resize(subdiv_context.subdiv_display_edges.size());
-    threading::parallel_for_aligned(span.index_range(), 4096, 64, [&](const IndexRange range) {
+    threading::parallel_for_aligned(
+        span.index_range(), 4096, bits::BitsPerInt, [&](const IndexRange range) {
       for (const int i : range) {
         bit_vector[i].set(span[i]);
       }