diff --git a/include/asm-arm/arch-kirkwood/gpio.h b/include/asm-arm/arch-kirkwood/gpio.h
index 5c869198a7..a79102ba54 100644
--- a/include/asm-arm/arch-kirkwood/gpio.h
+++ b/include/asm-arm/arch-kirkwood/gpio.h
@@ -37,6 +37,8 @@
 /*
  * Kirkwood-specific GPIO API
  */
+
+void kw_gpio_set_valid(unsigned pin, int mode);
 int kw_gpio_is_valid(unsigned pin, int mode);
 int kw_gpio_direction_input(unsigned pin);
 int kw_gpio_direction_output(unsigned pin, int value);