diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c
index 0ca83ac..ba30e23 100644
--- a/drivers/serial/mpsc.c
+++ b/drivers/serial/mpsc.c
@@ -1165,7 +1165,7 @@
 			flag = SA_SHIRQ;
 
 		if (request_irq(pi->port.irq, mpsc_sdma_intr, flag,
-				"mpsc/sdma", pi))
+				"mpsc-sdma", pi))
 			printk(KERN_ERR "MPSC: Can't get SDMA IRQ %d\n",
 			       pi->port.irq);