diff --git a/arch/i386/pci/acpi.c b/arch/i386/pci/acpi.c
index 2db65ec..42913f4 100644
--- a/arch/i386/pci/acpi.c
+++ b/arch/i386/pci/acpi.c
@@ -30,6 +30,7 @@
 	acpi_irq_penalty_init();
 	pcibios_scanned++;
 	pcibios_enable_irq = acpi_pci_irq_enable;
+	pcibios_disable_irq = acpi_pci_irq_disable;
 
 	if (pci_routeirq) {
 		/*