diff --git a/ADMconstraints/schedule.ccl b/ADMconstraints/schedule.ccl
index added4d5..84a550d4 100644
--- a/ADMconstraints/schedule.ccl
+++ b/ADMconstraints/schedule.ccl
@@ -34,6 +34,7 @@ if (calc_constraints) {
     READS: TmunuBaseX::eTij(interior)
     WRITES: HC(interior)
     WRITES: MC(interior)
+    SYNC: HC MC
   } "Calculate ADM Constraints"
 
   if (use_lapse_mask) {