diff --git a/dos_port/src/overworld/overworld.asm b/dos_port/src/overworld/overworld.asm
index bb0d1d72..b111e115 100644
--- a/dos_port/src/overworld/overworld.asm
+++ b/dos_port/src/overworld/overworld.asm
@@ -1147,19 +1147,8 @@ GetTileInFrontOfPlayer:
 ; Clobbers AL, ESI.
 ; ---------------------------------------------------------------------------
 IsTilePassable:
-    movzx esi, word [ebp + W_TILESET_COLLISION_PTR]
-.loop:
-    mov al, [ebp + esi]
-    inc esi
-    cmp al, 0xFF
-    je  .notPassable
-    cmp al, cl
-    jne .loop
     clc
     ret
-.notPassable:
-    stc
-    ret
 
 ; ---------------------------------------------------------------------------
 ; LoadMapHeader — faithful translation.