diff --git a/sys/dev/acpica/Osd/OsdInterrupt.c b/sys/dev/acpica/Osd/OsdInterrupt.c
index d848145b1203..d4b01c726731 100644
--- a/sys/dev/acpica/Osd/OsdInterrupt.c
+++ b/sys/dev/acpica/Osd/OsdInterrupt.c
@@ -46,6 +46,8 @@ ACPI_MODULE_NAME("INTERRUPT")
 static void		InterruptWrapper(void *arg);
 static OSD_HANDLER	InterruptHandler;
 
+static UINT32 InterruptOverride = 0;
+
 /*
  * XXX this does not correctly free resources in the case of partically successful
  * attachment.
@@ -81,6 +83,12 @@ AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, OSD_HANDLER ServiceRoutine
 	return_ACPI_STATUS(AE_ALREADY_EXISTS);
     }
     sc->acpi_irq_rid = 0;
+    if (InterruptOverride != 0) {
+	    device_printf(sc->acpi_dev,
+		"Overriding SCI Interrupt from IRQ %u to IRQ %u\n",
+		InterruptNumber, InterruptOverride);
+	    InterruptNumber = InterruptOverride;
+    }
     bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1);
     if ((sc->acpi_irq = bus_alloc_resource(sc->acpi_dev, SYS_RES_IRQ, &sc->acpi_irq_rid, 0, ~0, 1, 
 					   RF_SHAREABLE | RF_ACTIVE)) == NULL) {
@@ -123,6 +131,16 @@ AcpiOsRemoveInterruptHandler (UINT32 InterruptNumber, OSD_HANDLER ServiceRoutine
     return_ACPI_STATUS(AE_OK);
 }
 
+ACPI_STATUS
+acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
+{
+
+	if (InterruptOverride != 0)
+		return_ACPI_STATUS(AE_ALREADY_EXISTS);
+	InterruptOverride = InterruptNumber;
+	return_ACPI_STATUS(AE_OK);
+}
+
 /*
  * Interrupt handler wrapper.
  */
diff --git a/sys/dev/acpica/acpivar.h b/sys/dev/acpica/acpivar.h
index 77e36ad38f8f..dad516544d28 100644
--- a/sys/dev/acpica/acpivar.h
+++ b/sys/dev/acpica/acpivar.h
@@ -184,6 +184,7 @@ extern ACPI_STATUS	acpi_FindIndexedResource(ACPI_BUFFER *buf, int index,
 						 ACPI_RESOURCE **resp);
 extern ACPI_STATUS	acpi_AppendBufferResource(ACPI_BUFFER *buf,
 						  ACPI_RESOURCE *res);
+extern ACPI_STATUS	acpi_OverrideInterruptLevel(UINT32 InterruptNumber);
 extern ACPI_STATUS	acpi_SetIntrModel(int model);
 extern ACPI_STATUS	acpi_SetSleepState(struct acpi_softc *sc, int state);
 extern ACPI_STATUS	acpi_Enable(struct acpi_softc *sc);