diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c
index 59ee61d..489657c 100644
--- a/drivers/usb/host/xhci-hcd.c
+++ b/drivers/usb/host/xhci-hcd.c
@@ -384,7 +384,7 @@
 
 	xhci_dbg(xhci, "// Set the interrupt modulation register\n");
 	temp = xhci_readl(xhci, &xhci->ir_set->irq_control);
-	temp &= 0xffff;
+	temp &= ~ER_IRQ_INTERVAL_MASK;
 	temp |= (u32) 160;
 	xhci_writel(xhci, temp, &xhci->ir_set->irq_control);