diff --git a/module/zfs/zio.c b/module/zfs/zio.c
index aeea58bedfe4..89b20bc92181 100644
--- a/module/zfs/zio.c
+++ b/module/zfs/zio.c
@@ -3318,8 +3318,8 @@ zio_write_gang_block(zio_t *pio, metaslab_class_t *mc)
 	} else if (any_failed && candidate > SPA_OLD_GANGBLOCKSIZE &&
 	    spa_feature_is_enabled(spa, SPA_FEATURE_DYNAMIC_GANG_HEADER) &&
 	    !spa_feature_is_active(spa, SPA_FEATURE_DYNAMIC_GANG_HEADER)) {
-		dmu_tx_t *tx =
-		    dmu_tx_create_assigned(spa->spa_dsl_pool, txg + 1);
+		dmu_tx_t *tx = dmu_tx_create_assigned(spa->spa_dsl_pool,
+		    spa_syncing_txg(spa) + 1);
 		dsl_sync_task_nowait(spa->spa_dsl_pool,
 		    zio_update_feature,
 		    (void *)SPA_FEATURE_DYNAMIC_GANG_HEADER, tx);