diff --git a/sys/security/mac_do/mac_do.c b/sys/security/mac_do/mac_do.c
index 3da2f4ed5c8..03569fab87d 100644
--- a/sys/security/mac_do/mac_do.c
+++ b/sys/security/mac_do/mac_do.c
@@ -1292,7 +1292,7 @@ dealloc_jail_osd(void *const value)
  * Remove the rules specifically associated to a prison.
  *
  * In practice, this means that the rules become inherited (from the closest
- * ascendant that has some).
+ * ancestor that has some).
  *
  * Destroys the 'osd_jail_slot' slot of the passed jail.
  */