diff --git a/src/soc/amd/stoneyridge/acpi.c b/src/soc/amd/stoneyridge/acpi.c
index 81dfc14807..e2fb2e344f 100644
--- a/src/soc/amd/stoneyridge/acpi.c
+++ b/src/soc/amd/stoneyridge/acpi.c
@@ -40,7 +40,7 @@ unsigned long acpi_fill_madt(unsigned long current)
 			MP_IRQ_TRIGGER_DEFAULT | MP_IRQ_POLARITY_DEFAULT);
 	/* SCI IRQ type override */
 	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)current,
-			MP_BUS_ISA, 9, 9,
+			MP_BUS_ISA, ACPI_SCI_IRQ, ACPI_SCI_IRQ,
 			MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_LOW);
 
 	return current;
@@ -54,7 +54,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 {
 	printk(BIOS_DEBUG, "pm_base: 0x%04x\n", ACPI_IO_BASE);
 
-	fadt->sci_int = 9;		/* IRQ 09 - ACPI SCI */
+	fadt->sci_int = ACPI_SCI_IRQ;
 
 	if (permanent_smi_handler()) {
 		fadt->smi_cmd = APM_CNT;
diff --git a/src/soc/amd/stoneyridge/include/soc/acpi.h b/src/soc/amd/stoneyridge/include/soc/acpi.h
index 21ffd5fbdc..302416e113 100644
--- a/src/soc/amd/stoneyridge/include/soc/acpi.h
+++ b/src/soc/amd/stoneyridge/include/soc/acpi.h
@@ -6,6 +6,8 @@
 #include <acpi/acpi.h>
 #include <amdblocks/acpi.h>
 
+#define ACPI_SCI_IRQ 9
+
 #if CONFIG(STONEYRIDGE_LEGACY_FREE)
 	#define FADT_BOOT_ARCH ACPI_FADT_LEGACY_FREE
 #else