diff --git a/Grow.c b/Grow.c
index ce80c52..5a6e4c2 100644
--- a/Grow.c
+++ b/Grow.c
@@ -4262,6 +4262,7 @@ int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape,
 		}
 		if (rv == 0 && increasing && !st->ss->external) {
 			/* No longer need to monitor this reshape */
+			sysfs_set_str(sra, NULL, "sync_max", "max");
 			done = 1;
 			break;
 		}