diff --git a/lib/libc/stdtime/strftime.3 b/lib/libc/stdtime/strftime.3
index 9a1f2d5bfff9..0ff3ad77dc69 100644
--- a/lib/libc/stdtime/strftime.3
+++ b/lib/libc/stdtime/strftime.3
@@ -66,13 +66,19 @@ and one other character.
 .Pp
 No more than
 .Fa maxsize
-characters will be placed into the array.
+characters will be placed into the array.  If more characters than
+.Fa maxsize
+could have been written into
+.Fa buf
+then
+.Fa bug
+will not be NUL terminated.
 If the total number of resulting characters, including the terminating
-null character, is not more than
+NUL character, is not more than
 .Fa maxsize ,
 .Fn strftime
 returns the number of characters in the array, not counting the
-terminating null.
+terminating NUL.
 Otherwise, zero is returned.
 .Pp
 Each conversion specification is replaced by the characters as