diff --git a/include/mmc.h b/include/mmc.h
index 465daeb085..d652c1484e 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -479,6 +479,7 @@ void board_mmc_power_init(void);
 int board_mmc_init(bd_t *bis);
 int cpu_mmc_init(bd_t *bis);
 int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr);
+int mmc_get_env_dev(void);
 
 struct pci_device_id;