diff --git a/arch/arm/mach-sa1100/include/mach/gpio.h b/arch/arm/mach-sa1100/include/mach/gpio.h
index ab45b436b044..703631887c94 100644
--- a/arch/arm/mach-sa1100/include/mach/gpio.h
+++ b/arch/arm/mach-sa1100/include/mach/gpio.h
@@ -53,7 +53,5 @@ static inline void gpio_set_value(unsigned gpio, int value)
 
 #define gpio_to_irq(gpio)	((gpio < 11) ? (IRQ_GPIO0 + gpio) : \
 					(IRQ_GPIO11 - 11 + gpio))
-#define irq_to_gpio(irq)	((irq < IRQ_GPIO11_27) ? (irq - IRQ_GPIO0) : \
-					(irq - IRQ_GPIO11 + 11))
 
 #endif