diff --git a/target/init.c b/target/init.c
index 7c7ffb2..b49cbef 100644
--- a/target/init.c
+++ b/target/init.c
@@ -38,3 +38,7 @@
 {
 }
 
+__WEAK int target_is_emmc_boot(void)
+{
+    return 0;
+}