diff --git a/include/asm-arm/arch-ixp23xx/irqs.h b/include/asm-arm/arch-ixp23xx/irqs.h
index e69639585721..27c580898958 100644
--- a/include/asm-arm/arch-ixp23xx/irqs.h
+++ b/include/asm-arm/arch-ixp23xx/irqs.h
@@ -153,7 +153,7 @@
  */
 #define NR_IXP23XX_MACH_IRQS 		32
 
-#define NR_IRQS				NR_IXP23XX_IRQS + NR_IXP23XX_MACH_IRQS
+#define NR_IRQS				(NR_IXP23XX_IRQS + NR_IXP23XX_MACH_IRQS)
 
 #define IXP23XX_MACH_IRQ(irq) 		(NR_IXP23XX_IRQ + (irq))
 
diff --git a/include/asm-arm/arch-omap/board-innovator.h b/include/asm-arm/arch-omap/board-innovator.h
index b3cf33441f6e..56d2c98e143c 100644
--- a/include/asm-arm/arch-omap/board-innovator.h
+++ b/include/asm-arm/arch-omap/board-innovator.h
@@ -37,7 +37,7 @@
 #define OMAP1510P1_EMIFF_PRI_VALUE		0x00
 
 #define NR_FPGA_IRQS		24
-#define NR_IRQS                 IH_BOARD_BASE + NR_FPGA_IRQS
+#define NR_IRQS                 (IH_BOARD_BASE + NR_FPGA_IRQS)
 
 #ifndef __ASSEMBLY__
 void fpga_write(unsigned char val, int reg);