diff --git a/include/fsl_esdhc.h b/include/fsl_esdhc.h
index 2c97398..89bcbd1 100644
--- a/include/fsl_esdhc.h
+++ b/include/fsl_esdhc.h
@@ -182,5 +182,6 @@
 static inline int fsl_esdhc_mmc_init(bd_t *bis) { return -ENOSYS; }
 static inline void fdt_fixup_esdhc(void *blob, bd_t *bd) {}
 #endif /* CONFIG_FSL_ESDHC */
+void __noreturn mmc_boot(void);
 
 #endif  /* __FSL_ESDHC_H__ */