1 files changed, 1 insertions, 2 deletions
diff --git a/rts/sm/GCUtils.c b/rts/sm/GCUtils.c
index 70c53cb8bf..7e99e29023 100644
--- a/rts/sm/GCUtils.c
+++ b/rts/sm/GCUtils.c
@@ -269,8 +269,7 @@ alloc_todo_block (step_workspace *ws, nat size)
         } else {
             bd = allocBlock_sync();
         }
-        bd->step = ws->step;
-        bd->gen_no = ws->step->gen_no;
+        initBdescr(bd, ws->step);
         bd->flags = BF_EVACUATED;
         bd->u.scan = bd->free = bd->start;
     }