diff --git a/rogueviz/ru/classes.cpp b/rogueviz/ru/classes.cpp
index 890e6886..87da840e 100644
--- a/rogueviz/ru/classes.cpp
+++ b/rogueviz/ru/classes.cpp
@@ -350,6 +350,8 @@ struct entity {
   virtual void on_reset_all() {}
 
   entity *hal();
+
+  virtual bool nonstatic() { return true; }
   };
 
 struct weaponmod {
@@ -453,7 +455,8 @@ struct moving_platform : public entity {
   virtual moving_platform* as_platform() { return this; }
   string get_name() override { return "moving platform"; }
   string get_help() override { return "Moving platforms move."; }
-};
+  bool nonstatic() override { return false; }
+  };
 
 struct ferris_platform : public moving_platform {
   xy location_at(ld t) override;
diff --git a/rogueviz/ru/save.cpp b/rogueviz/ru/save.cpp
index 4fa2e9bb..0cdce455 100644
--- a/rogueviz/ru/save.cpp
+++ b/rogueviz/ru/save.cpp
@@ -73,7 +73,7 @@ void save_as(string fname) {
     for(int x=0; x<room_y; x++) if(r.block_at[y][x] != r.orig_block_at[y][x])
       println(f, "AT ", y, " ", x, " ", r.block_at[y][x]);
 
-    for(auto& e: r.entities) save_via_stater(f, *e, "ENTITY");
+    for(auto& e: r.entities) if(e->nonstatic()) save_via_stater(f, *e, "ENTITY");
 
     if(r.timed_orb_end >= gframeid) println(f, "TIMER ", r.timed_orb_end);
     println(f);