diff --git a/racing.cpp b/racing.cpp
index 5818507d..6880a1e1 100644
--- a/racing.cpp
+++ b/racing.cpp
@@ -848,6 +848,7 @@ void markers() {
     cell *goal = NULL;
     for(cell *c: track) if(inscreenrange(c)) goal = c;
     hyperpoint H = tC0(ggmatrix(goal));
+    if(invalid_point(H)) return;
     queuechr(H, 2*vid.fsize, 'X', 0x10100 * int(128 + 100 * sintick(150)));
     queuestr(H, vid.fsize, 
       (geometry == gCrystal && !crystal::pure()) ? fts(crystal::space_distance(cwt.at, track.back())) :