diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index f0b0668..bc458f5 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -524,7 +524,7 @@
 	do_ubd_request(ubd_queue);
 }
 
-static irqreturn_t ubd_intr(int irq, void *dev, struct pt_regs *unused)
+static irqreturn_t ubd_intr(int irq, void *dev)
 {
 	ubd_handler();
 	return(IRQ_HANDLED);