diff --git a/docs/tr1/CHANGELOG.md b/docs/tr1/CHANGELOG.md
index 55924db91..c0a235d53 100644
--- a/docs/tr1/CHANGELOG.md
+++ b/docs/tr1/CHANGELOG.md
@@ -24,6 +24,7 @@
     Swedish, Turkish and possibly more.
 
     Importantly, Asian and Arabic languages remain unsupported at the moment.
+- fixed a potential invisible wall issue in custom levels with non-portal doors and certain geometry (#1958, regression from 4.3)
 
 ## [4.6.1](https://github.com/LostArtefacts/TRX/compare/tr1-4.6...tr1-4.6.1) - 2024-11-25
 - added ability to disable saves completely by setting the save slot to 0 (#1954)
diff --git a/src/tr1/game/objects/general/door.c b/src/tr1/game/objects/general/door.c
index 786ee3e09..b8af0eed4 100644
--- a/src/tr1/game/objects/general/door.c
+++ b/src/tr1/game/objects/general/door.c
@@ -97,6 +97,8 @@ static void M_Shut(DOORPOS_DATA *const d)
     sector->box = NO_BOX;
     sector->floor.height = NO_HEIGHT;
     sector->ceiling.height = NO_HEIGHT;
+    sector->floor.tilt = 0;
+    sector->ceiling.tilt = 0;
     sector->portal_room.sky = NO_ROOM;
     sector->portal_room.pit = NO_ROOM;
     sector->portal_room.wall = NO_ROOM;
diff --git a/src/tr2/game/objects/general/door.c b/src/tr2/game/objects/general/door.c
index edbe09900..0a77e5cda 100644
--- a/src/tr2/game/objects/general/door.c
+++ b/src/tr2/game/objects/general/door.c
@@ -67,6 +67,8 @@ void __cdecl Door_Shut(DOORPOS_DATA *const d)
     sector->box = NO_BOX;
     sector->ceiling.height = NO_HEIGHT;
     sector->floor.height = NO_HEIGHT;
+    sector->floor.tilt = 0;
+    sector->ceiling.tilt = 0;
     sector->portal_room.sky = NO_ROOM_NEG;
     sector->portal_room.pit = NO_ROOM_NEG;
     sector->portal_room.wall = NO_ROOM;