diff --git a/include/sys/spa.h b/include/sys/spa.h
index 0079c18fea34..e7cbff806d98 100644
--- a/include/sys/spa.h
+++ b/include/sys/spa.h
@@ -566,7 +566,7 @@ extern void spa_stats_init(spa_t *spa);
 extern void spa_stats_destroy(spa_t *spa);
 extern void spa_read_history_add(spa_t *spa, const zbookmark_t *zb,
     uint32_t aflags);
-extern void spa_txg_history_add(spa_t *spa, uint64_t txg);
+extern void spa_txg_history_add(spa_t *spa, uint64_t txg, hrtime_t birth_time);
 extern int spa_txg_history_set(spa_t *spa,  uint64_t txg,
     txg_state_t completed_state, hrtime_t completed_time);
 extern int spa_txg_history_set_io(spa_t *spa,  uint64_t txg, uint64_t nread,
diff --git a/module/zfs/spa_stats.c b/module/zfs/spa_stats.c
index 2576d867fb92..a94fecfe87f8 100644
--- a/module/zfs/spa_stats.c
+++ b/module/zfs/spa_stats.c
@@ -422,7 +422,7 @@ spa_txg_history_destroy(spa_t *spa)
  * Add a new txg to historical record.
  */
 void
-spa_txg_history_add(spa_t *spa, uint64_t txg)
+spa_txg_history_add(spa_t *spa, uint64_t txg, hrtime_t birth_time)
 {
 	spa_stats_history_t *ssh = &spa->spa_stats.txg_history;
 	spa_txg_history_t *sth, *rm;
@@ -433,7 +433,7 @@ spa_txg_history_add(spa_t *spa, uint64_t txg)
 	sth = kmem_zalloc(sizeof (spa_txg_history_t), KM_PUSHPAGE);
 	sth->txg = txg;
 	sth->state = TXG_STATE_OPEN;
-	sth->times[TXG_STATE_BIRTH] = gethrtime();
+	sth->times[TXG_STATE_BIRTH] = birth_time;
 
 	mutex_enter(&ssh->lock);
 
diff --git a/module/zfs/txg.c b/module/zfs/txg.c
index 89615a21a404..9e9db9989fb7 100644
--- a/module/zfs/txg.c
+++ b/module/zfs/txg.c
@@ -377,8 +377,8 @@ txg_quiesce(dsl_pool_t *dp, uint64_t txg)
 	tx->tx_open_txg++;
 	tx->tx_open_time = gethrtime();
 
-	spa_txg_history_set(dp->dp_spa, txg, TXG_STATE_OPEN, gethrtime());
-	spa_txg_history_add(dp->dp_spa, tx->tx_open_txg);
+	spa_txg_history_set(dp->dp_spa, txg, TXG_STATE_OPEN, tx->tx_open_time);
+	spa_txg_history_add(dp->dp_spa, tx->tx_open_txg, tx->tx_open_time);
 
 	DTRACE_PROBE2(txg__quiescing, dsl_pool_t *, dp, uint64_t, txg);
 	DTRACE_PROBE2(txg__opened, dsl_pool_t *, dp, uint64_t, tx->tx_open_txg);