diff --git a/hw/ahci.c b/hw/ahci.c
index b6a81af..cb4a851 100644
--- a/hw/ahci.c
+++ b/hw/ahci.c
@@ -676,6 +676,7 @@ static void handle_cmd(AHCIState *s,int port,int slot)
 				write_to_sglist(ide_state->identify_data, sizeof(ide_state->identify_data),s->prdt_buf,prdt_num);
 				pr->irq_stat |= (1<<2);
 				break;
+			case WIN_STANDBYNOW1:
 			case WIN_SETFEATURES:
 				pr->irq_stat |= (1<<2);
 				break;