diff --git a/source/blender/editors/mesh/editmesh_undo.cc b/source/blender/editors/mesh/editmesh_undo.cc
index 139051b9cc4..e0d699ff978 100644
--- a/source/blender/editors/mesh/editmesh_undo.cc
+++ b/source/blender/editors/mesh/editmesh_undo.cc
@@ -334,6 +334,7 @@ static void um_arraystore_cd_expand(const BArrayCustomData *bcd,
         if (state) {
           size_t state_len;
           layer->data = BLI_array_store_state_data_get_alloc(state, &state_len);
+          layer->sharing_info = implicit_sharing::info_for_mem_free(layer->data);
           BLI_assert(stride * data_len == state_len);
           UNUSED_VARS_NDEBUG(stride, data_len);
         }