diff --git a/target/init.c b/target/init.c
index 9c850e5..ae1e311 100644
--- a/target/init.c
+++ b/target/init.c
@@ -59,6 +59,11 @@
     return 0;
 }
 
+__WEAK int update_ubi_vol(void)
+{
+    return 0;
+}
+
 __WEAK int target_is_emmc_boot(void)
 {
 #if _EMMC_BOOT