diff --git a/include/asm-arm/hardware/iop3xx.h b/include/asm-arm/hardware/iop3xx.h
index ebbcd9be3fe55eac1a058a41a45c8f5353e730c7..63feceb7ede558afe103496036f46cfb7195924b 100644
--- a/include/asm-arm/hardware/iop3xx.h
+++ b/include/asm-arm/hardware/iop3xx.h
@@ -42,7 +42,7 @@ extern int init_atu;
 					IOP3XX_PERIPHERAL_SIZE - 1)
 #define IOP3XX_PERIPHERAL_UPPER_VA (IOP3XX_PERIPHERAL_VIRT_BASE +\
 					IOP3XX_PERIPHERAL_SIZE - 1)
-#define IOP3XX_PMMR_PHYS_TO_VIRT(addr) (u32) ((u32) addr -\
+#define IOP3XX_PMMR_PHYS_TO_VIRT(addr) (u32) ((u32) (addr) -\
 					(IOP3XX_PERIPHERAL_PHYS_BASE\
 					- IOP3XX_PERIPHERAL_VIRT_BASE))
 #define IOP3XX_REG_ADDR(reg)		(IOP3XX_PERIPHERAL_VIRT_BASE + (reg))