diff --git a/src/objects/random-item.c b/src/objects/random-item.c
index a9fdae254..5e07c6de5 100644
--- a/src/objects/random-item.c
+++ b/src/objects/random-item.c
@@ -114,7 +114,7 @@ void Obj_RandomItemVisuals(mobj_t *mobj)
 	// the player's cleared out a good portion of the map.
 	//
 	// Then extraval1 starts ticking up and triggers the transformation from Ringbox to Random Item.
-	if (mobj->fuse == 0 && !(mobj->flags & MF_NOCLIPTHING)
+	if (mobj->fuse == 0 && !(mobj->flags & MF_NOCLIPTHING) && !(mobj->flags2 & MF2_AMBUSH)
 		&& !cv_thunderdome.value && !(modeattacking & ATTACKING_SPB))
 	{
 		mobj->extravalue1++;
diff --git a/src/p_mobj.c b/src/p_mobj.c
index dd076a12b..f92794602 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -13273,6 +13273,8 @@ static boolean P_SetupSpawnedMapThing(mapthing_t *mthing, mobj_t *mobj)
 				P_SetThingPosition(mobj);
 			}
 		}
+		if (mthing->args[0] == 1)
+			mobj->flags2 |= MF2_AMBUSH;
 		break;
 	}
 	case MT_ITEMCAPSULE: