diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 9cfa82b72b..5651372be3 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -580,7 +580,7 @@ static void ahci_write_fis_sdb(AHCIState *s, int port, uint32_t finished)
     sdb_fis = (SDBFIS *)&ad->res_fis[RES_FIS_SDBFIS];
     ide_state = &ad->port.ifs[0];
 
-    sdb_fis->type = 0xA1;
+    sdb_fis->type = SATA_FIS_TYPE_SDB;
     /* Interrupt pending & Notification bit */
     sdb_fis->flags = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
     sdb_fis->status = ide_state->status & 0x77;
@@ -631,7 +631,7 @@ static void ahci_write_fis_pio(AHCIDevice *ad, uint16_t len)
 
     pio_fis = &ad->res_fis[RES_FIS_PSFIS];
 
-    pio_fis[0] = 0x5f;
+    pio_fis[0] = SATA_FIS_TYPE_PIO_SETUP;
     pio_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
     pio_fis[2] = s->status;
     pio_fis[3] = s->error;
@@ -690,7 +690,7 @@ static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis)
 
     d2h_fis = &ad->res_fis[RES_FIS_RFIS];
 
-    d2h_fis[0] = 0x34;
+    d2h_fis[0] = SATA_FIS_TYPE_REGISTER_D2H;
     d2h_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
     d2h_fis[2] = s->status;
     d2h_fis[3] = s->error;
diff --git a/hw/ide/ahci.h b/hw/ide/ahci.h
index e0d2eb8f15..99aa0c967f 100644
--- a/hw/ide/ahci.h
+++ b/hw/ide/ahci.h
@@ -156,7 +156,10 @@
 #define AHCI_SCR_SCTL_DET                 0xf
 
 #define SATA_FIS_TYPE_REGISTER_H2D        0x27
-#define SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER 0x80
+#define   SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER 0x80
+#define SATA_FIS_TYPE_REGISTER_D2H        0x34
+#define SATA_FIS_TYPE_PIO_SETUP           0x5f
+#define SATA_FIS_TYPE_SDB                 0xA1
 
 #define AHCI_CMD_HDR_CMD_FIS_LEN           0x1f
 #define AHCI_CMD_HDR_PRDT_LEN              16