diff --git a/tools/viewconf.c b/tools/viewconf.c
index d70e4f3c3..8be720d56 100644
--- a/tools/viewconf.c
+++ b/tools/viewconf.c
@@ -62,10 +62,10 @@
 ##### "TSCH_CONF_DEFAULT_TIMESLOT_LENGTH": _____ -> TSCH_DEFAULT_TIMESLOT_LENGTH
 #endif
 
-#ifdef TSCH_CONF_SCHEDULE_DEFAULT_LENGTH
-##### "TSCH_CONF_SCHEDULE_DEFAULT_LENGTH": _____ == TSCH_CONF_SCHEDULE_DEFAULT_LENGTH
+#ifdef TSCH_SCHEDULE_CONF_DEFAULT_LENGTH
+##### "TSCH_SCHEDULE_CONF_DEFAULT_LENGTH": _____ == TSCH_SCHEDULE_CONF_DEFAULT_LENGTH
 #else
-##### "TSCH_CONF_SCHEDULE_DEFAULT_LENGTH": _____ -> TSCH_CHEDULE_DEFAULT_LENGTH
+##### "TSCH_SCHEDULE_CONF_DEFAULT_LENGTH": _____ -> TSCH_SCHEDULE_DEFAULT_LENGTH
 #endif
 
 #else /* MAC_CONF_WITH_TSCH */