diff --git a/src/include/66/constants.h b/src/include/66/constants.h
index efdefe01b83a9feacd5d64912e83812c1e9b4221..121f48bd8166120d0719e0f430cfc67aeffd63d9 100644
--- a/src/include/66/constants.h
+++ b/src/include/66/constants.h
@@ -89,6 +89,9 @@
 #define SS_EVENTDIR "/event"
 #define SS_EVENTDIR_LEN (sizeof SS_EVENTDIR - 1)
 
+#define SS_SUPERVISEDIR "/supervise"
+#define SS_SUPERVISEDIR_LEN (sizeof SS_SUPERVISEDIR - 1)
+
 /** boot */
 #define SS_BOOT_CONF "init.conf"
 #define SS_BOOT_CONF_LEN (sizeof SS_BOOT_CONF - 1)