diff --git a/src/add-ons/kernel/busses/usb/uhci.cpp b/src/add-ons/kernel/busses/usb/uhci.cpp
index 2b882f09e6..3b13824d71 100644
--- a/src/add-ons/kernel/busses/usb/uhci.cpp
+++ b/src/add-ons/kernel/busses/usb/uhci.cpp
@@ -332,13 +332,14 @@ UHCI::UHCI(pci_info *info, Stack *stack)
 	sPCIModule->write_pci_config(fPCIInfo->bus, fPCIInfo->device,
 		fPCIInfo->function, PCI_command, 2, command);
 
-	// make sure we gain control of the UHCI controller instead of the BIOS
-	sPCIModule->write_pci_config(fPCIInfo->bus, fPCIInfo->device,
-		fPCIInfo->function, PCI_LEGSUP, 2, PCI_LEGSUP_USBPIRQDEN);
-
 	// disable interrupts
 	WriteReg16(UHCI_USBINTR, 0);
 
+	// make sure we gain control of the UHCI controller instead of the BIOS
+	sPCIModule->write_pci_config(fPCIInfo->bus, fPCIInfo->device,
+		fPCIInfo->function, PCI_LEGSUP, 2, PCI_LEGSUP_USBPIRQDEN
+		| PCI_LEGSUP_CLEAR_SMI);
+
 	// do a global and host reset
 	GlobalReset();
 	if (ControllerReset() < B_OK) {
diff --git a/src/add-ons/kernel/busses/usb/uhci_hardware.h b/src/add-ons/kernel/busses/usb/uhci_hardware.h
index 217c19ff41..47e35f1df9 100644
--- a/src/add-ons/kernel/busses/usb/uhci_hardware.h
+++ b/src/add-ons/kernel/busses/usb/uhci_hardware.h
@@ -19,8 +19,9 @@
 // ** -- Only writable with words!
 
 // PCI register
-#define PCI_LEGSUP 0xC0
-#define PCI_LEGSUP_USBPIRQDEN 0x2000
+#define PCI_LEGSUP				0xC0
+#define PCI_LEGSUP_USBPIRQDEN	0x2000
+#define PCI_LEGSUP_CLEAR_SMI	0x8f00
 
 // Registers
 #define UHCI_USBCMD				0x00 	// USB Command - word - R/W