diff --git a/dat/mines.des b/dat/mines.des
index b6e2646f0..5afb83055 100644
--- a/dat/mines.des
+++ b/dat/mines.des
@@ -502,26 +502,26 @@ MAZE: "minetn-6",' '
 INIT_MAP:'.','-',true,true,lit,true
 GEOMETRY:center,top
 MAP
-.-----................----------------.
-.|...|................|...|..|...|...|.
-.|...+..--+--.........|...|..|...|...|.
-.|...|..|...|..-----..|...|..|-+---+--.
-.-----..|...|--|...|..--+---+-.........
-........|...|..|...+.............-----.
-........-----..|...|......--+-...|...|.
-.----...|...|+------..{...|..|...+...|.
-.|..+...|...|.............|..|...|...|.
-.|..|...|...|-+-.....---+-------------.
-.----...--+--..|..-+-|.................
-...|........|..|..|..|----....---------
-...|..T.....----..|..|...+....|......|-
-...|-....{........|..|...|....+......|-
-...--..-....T.....--------....|......|-
-.......--.....................---------
+.-----................----------------.-
+.|...|................|...|..|...|...|..
+.|...+..--+--.........|...|..|...|...|..
+.|...|..|...|..-----..|...|..|-+---+--..
+.-----..|...|--|...|..--+---+-.........|
+........|...|..|...+.............-----..
+........-----..|...|......--+-...|...|..
+.----...|...|+------..{...|..|...+...|..
+.|..+...|...|.............|..|...|...|..
+.|..|...|...|-+-.....---+-------------.|
+.----...--+--..|..-+-|..................
+...|........|..|..|..|----....---------.
+...|..T.....----..|..|...+....|......|-.
+...|-....{........|..|...|....+......|-.
+...--..-....T.....--------....|......|-.
+.......--.....................----------
 ENDMAP
 REGION:(00,00,38,15),lit,"ordinary"
-STAIR:levregion(01,03,20,19),(0,0,38,15),up
-STAIR:levregion(21,03,75,19),(0,0,38,15),down
+STAIR:levregion(01,03,20,19),(0,0,39,15),up
+STAIR:levregion(21,03,75,19),(0,0,39,15),down
 REGION:(13,5,14,6),unlit,"ordinary"
 REGION:(9,7,11,9),lit,"candle shop"
 REGION:(16,4,18,6),lit,"tool shop"
diff --git a/doc/fixes34.1 b/doc/fixes34.1
index 46a42a1af..1409384a0 100644
--- a/doc/fixes34.1
+++ b/doc/fixes34.1
@@ -90,6 +90,7 @@ vault guards won't ask who you are if you're unconscious or paralyzed
 monsters should not repeatedly try to teleport on noteleport levels
 crocodiles legs are not designed for kicking open doors, chests, et al.
 walls of one of the luckstone locations in minend-3 were diggable
+minetn-6 could place downstairs in a cut-off location
 
 
 Platform- and/or Interface-Specific Fixes