diff --git a/board/nvidia/common/board.h b/board/nvidia/common/board.h
index d649eb7..344e702 100644
--- a/board/nvidia/common/board.h
+++ b/board/nvidia/common/board.h
@@ -26,6 +26,7 @@
 
 void tegra2_start(void);
 void gpio_config_uart(void);
+void gpio_config_mmc(void);
 int tegra2_mmc_init(int dev_index, int bus_width);
 
 #endif	/* BOARD_H */