diff --git a/source/games/sw/src/rooms.cpp b/source/games/sw/src/rooms.cpp
index 4dd1098b7..f08b972a0 100644
--- a/source/games/sw/src/rooms.cpp
+++ b/source/games/sw/src/rooms.cpp
@@ -1182,7 +1182,7 @@ void CollectPortals()
             auto pt2 = findother(pt.othersector);
             if (pt2)
             {
-                int pnum = portalAdd(PORTAL_SECTOR_FLOOR, -1, pt.offset.x, pt.offset.y, 0);
+                int pnum = portalAdd(PORTAL_SECTOR_CEILING, -1, pt.offset.x, pt.offset.y, 0);
                 allPortals[pnum].targets = std::move(pt2->sectors);
                 for (auto sec : pt.sectors)
                 {