--- a/arch/arm/mach-gemini/common.h
+++ b/arch/arm/mach-gemini/common.h
@@ -18,9 +18,9 @@ extern void gemini_map_io(void);
 extern void gemini_init_irq(void);
 extern void gemini_timer_init(void);
 extern void gemini_gpio_init(void);
-extern void platform_register_rtc(void);
 
 /* Common platform devices registration functions */
+extern int platform_register_rtc(void);
 extern int platform_register_uart(void);
 extern int platform_register_pflash(unsigned int size,
 				    struct mtd_partition *parts,
--- a/arch/arm/mach-gemini/devices.c
+++ b/arch/arm/mach-gemini/devices.c
@@ -17,6 +17,7 @@
 #include <mach/irqs.h>
 #include <mach/hardware.h>
 #include <mach/global_reg.h>
+#include "common.h"
 
 static struct plat_serial8250_port serial_platform_data[] = {
 	{