diff --git a/arch/arm/include/asm/arch-mx31/clock.h b/arch/arm/include/asm/arch-mx31/clock.h
index fb035c4..b132676 100644
--- a/arch/arm/include/asm/arch-mx31/clock.h
+++ b/arch/arm/include/asm/arch-mx31/clock.h
@@ -32,7 +32,7 @@
 };
 
 unsigned int mxc_get_clock(enum mxc_clock clk);
-extern u32 imx_get_uartclk();
+extern u32 imx_get_uartclk(void);
 extern void mx31_gpio_mux(unsigned long mode);
 extern void mx31_set_pad(enum iomux_pins pin, u32 config);