diff --git a/src/p_mobj.c b/src/p_mobj.c
index d58772f5c..c309b6a4f 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -12072,6 +12072,8 @@ void P_SpawnMapThing(mapthing_t *mthing)
 
 	else if (mthing->type == 750) // Slope vertex point (formerly chaos spawn)
 		return;
+	else if (mthing->type == 777 || mthing->type == 778) // Slope anchors
+		return;
 
 	else if (mthing->type == 300 // Ring
 		|| mthing->type == 308 || mthing->type == 309 // Team Rings