diff --git a/src/trap.c b/src/trap.c
index e48ccddd1..7ba8b0cc3 100644
--- a/src/trap.c
+++ b/src/trap.c
@@ -1,4 +1,4 @@
-/* NetHack 3.7	trap.c	$NHDT-Date: 1683116409 2023/05/03 12:20:09 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.530 $ */
+/* NetHack 3.7	trap.c	$NHDT-Date: 1683333758 2023/05/06 00:42:38 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.531 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /*-Copyright (c) Robert Patrick Rankin, 2013. */
 /* NetHack may be freely redistributed.  See license for details. */
@@ -438,7 +438,8 @@ maketrap(coordxy x, coordxy y, int typ)
         /* old <tx,ty> remain valid */
     } else if ((IS_FURNITURE(lev->typ)
                 && (!IS_GRAVE(lev->typ) || (typ != PIT && typ != HOLE)))
-               || (is_pool_or_lava(x, y) || IS_AIR(lev->typ))
+               || is_pool_or_lava(x, y)
+               || (IS_AIR(lev->typ) && typ != MAGIC_PORTAL)
                || (typ == LEVEL_TELEP && single_level_branch(&u.uz))) {
         /* no trap on top of furniture (caller usually screens the
            location to inhibit this, but wizard mode wishing doesn't)