diff --git a/target/init.c b/target/init.c
index bd5b325..c5a202c 100644
--- a/target/init.c
+++ b/target/init.c
@@ -176,3 +176,9 @@
 __WEAK void target_usb_phy_reset(void)
 {
 }
+
+/* determine if target is in warm boot. */
+__WEAK bool target_warm_boot(void)
+{
+	return false;
+}