diff --git a/src/include/66/constants.h b/src/include/66/constants.h
index c608b311b848e57af19e926f65d58099c98097cc..a754df73f28494101053890f68e6279c2758f93e 100644
--- a/src/include/66/constants.h
+++ b/src/include/66/constants.h
@@ -137,4 +137,5 @@
 #define SS_INSTANCE_TEMPLATE 0
 #define SS_INSTANCE_NAME 1
 
+#define SS_MAX_PATH_LEN (SS_MAX_PATH + SS_SYSTEM_LEN + SS_SVDIRS_LEN + SS_MAX_TREENAME + SS_MAX_SERVICE_NAME + 63 + 1)
 #endif