diff --git a/hooks.asm b/hooks.asm
index da3760e..a180750 100755
--- a/hooks.asm
+++ b/hooks.asm
@@ -1677,6 +1677,11 @@ org $028ADB ; <- Bank02.asm:2088-2095 (LDX.b #$14 : LDA $A0 ...)
 JSL.l Underworld_DoorDown_Entry : CPX #$10
 db $B0, $21 ; BCS $028B04
 BRA + : NOP #6 : +
+
+org $02C3F2 ; <- Bank02.asm:10521 Unused call
+Underworld_DoorDown_Call:
+org $02C3F3
+dw $8AD9 ; address of Bank02.asm:2085
 ;--------------------------------------------------------------------------------
 
 ;================================================================================
diff --git a/normal.asm b/normal.asm
index a8ab959..aabb24d 100644
--- a/normal.asm
+++ b/normal.asm
@@ -398,7 +398,7 @@ StraightStairsTrapDoor:
             .animateTraps
             lda #$05 : sta $11
             inc $0468 : stz $068e : stz $0690
-        ++ rtl
+        ++ JSL Underworld_DoorDown_Call : rtl
     + JML Dungeon_ApproachFixedColor ; what we wrote over
 }