diff --git a/Source/objects.cpp b/Source/objects.cpp
index 6ba2e8942..2c2106182 100644
--- a/Source/objects.cpp
+++ b/Source/objects.cpp
@@ -2396,7 +2396,11 @@ void ObjChangeMap(int x1, int y1, int x2, int y2)
 			dungeon[i][j] = pdungeon[i][j];
 		}
 	}
+#ifdef HELLFIRE
+	if (leveltype == DTYPE_CATHEDRAL && currlevel < 17) {
+#else
 	if (leveltype == DTYPE_CATHEDRAL) {
+#endif
 		ObjL1Special(2 * x1 + 16, 2 * y1 + 16, 2 * x2 + 17, 2 * y2 + 17);
 		AddL1Objs(2 * x1 + 16, 2 * y1 + 16, 2 * x2 + 17, 2 * y2 + 17);
 	}