diff --git a/include/asm-mips/mach-au1x00/au1000.h b/include/asm-mips/mach-au1x00/au1000.h
index 363a14ee0ae5..1b5064dac007 100644
--- a/include/asm-mips/mach-au1x00/au1000.h
+++ b/include/asm-mips/mach-au1x00/au1000.h
@@ -1036,7 +1036,7 @@ enum soc_au1200_ints {
 #define USBD_INTSTAT		0xB020001C
 #  define USBDEV_INT_SOF	(1 << 12)
 #  define USBDEV_INT_HF_BIT	6
-#  define USBDEV_INT_HF_MASK	0x3f << USBDEV_INT_HF_BIT)
+#  define USBDEV_INT_HF_MASK	(0x3f << USBDEV_INT_HF_BIT)
 #  define USBDEV_INT_CMPLT_BIT	0
 #  define USBDEV_INT_CMPLT_MASK (0x3f << USBDEV_INT_CMPLT_BIT)
 #define USBD_CONFIG		0xB0200020