diff --git a/src/mame/includes/xbox.h b/src/mame/includes/xbox.h
index 41cf01835fd..b16866057ae 100644
--- a/src/mame/includes/xbox.h
+++ b/src/mame/includes/xbox.h
@@ -478,6 +478,8 @@ public:
 	DECLARE_WRITE32_MEMBER(audio_ac93_w);
 	DECLARE_READ32_MEMBER(dummy_r);
 	DECLARE_WRITE32_MEMBER(dummy_w);
+	DECLARE_READ32_MEMBER(ohci_usb_r);
+	DECLARE_WRITE32_MEMBER(ohci_usb_w);
 
 	void smbus_register_device(int address, int(*handler)(xbox_base_state &chs, int command, int rw, int data));
 	int smbus_pic16lc(int command, int rw, int data);
diff --git a/src/mame/machine/xbox.cpp b/src/mame/machine/xbox.cpp
index 3698688ea2f..0c58e591fa6 100644
--- a/src/mame/machine/xbox.cpp
+++ b/src/mame/machine/xbox.cpp
@@ -567,11 +567,6 @@ READ32_MEMBER(ohci_usb_controller::read)
 		logerror("usb controller 0 register %s read\n", usbregnames[offset]);
 #endif
 	ret = ohcist.hc_regs[offset];
-	if (offset == 0) { /* hacks needed until usb (and jvs) is implemented */
-#ifndef USB_HACK_ENABLED
-		hack_usb();
-#endif
-	}
 	return ret;
 }
 
@@ -2522,11 +2517,33 @@ WRITE8_MEMBER(xbox_base_state::superiors232_write)
 	}
 }
 
+READ32_MEMBER(xbox_base_state::ohci_usb_r)
+{
+#ifdef USB_HACK_ENABLED
+	if (offset == 0) { /* hacks needed until usb (and jvs) is implemented */
+		hack_usb();
+	}
+#endif
+	return ohci_usb->read(space, offset, mem_mask);
+}
+
+WRITE32_MEMBER(xbox_base_state::ohci_usb_w)
+{
+#ifndef USB_HACK_ENABLED
+	ohci_usb->write(space, offset, mem_mask);
+#endif
+}
+
+
 ADDRESS_MAP_START(xbox_base_map, AS_PROGRAM, 32, xbox_base_state)
 	AM_RANGE(0x00000000, 0x07ffffff) AM_RAM AM_SHARE("nv2a_share") // 128 megabytes
 	AM_RANGE(0xf0000000, 0xf7ffffff) AM_RAM AM_SHARE("nv2a_share") // 3d accelerator wants this
 	AM_RANGE(0xfd000000, 0xfdffffff) AM_RAM AM_READWRITE(geforce_r, geforce_w)
+#ifdef USB_HACK_ENABLED
+	AM_RANGE(0xfed00000, 0xfed003ff) AM_READWRITE(ohci_usb_r, ohci_usb_w)
+#else
 	AM_RANGE(0xfed00000, 0xfed003ff) AM_DEVREADWRITE("ohci_usb", ohci_usb_controller, read, write)
+#endif
 	AM_RANGE(0xfe800000, 0xfe85ffff) AM_READWRITE(audio_apu_r, audio_apu_w)
 	AM_RANGE(0xfec00000, 0xfec001ff) AM_READWRITE(audio_ac93_r, audio_ac93_w)
 	AM_RANGE(0xff000000, 0xff0fffff) AM_ROM AM_REGION("bios", 0) AM_MIRROR(0x00f80000)