diff --git a/peer/on_tick.go b/peer/on_tick.go
index 83137e0..1eae224 100644
--- a/peer/on_tick.go
+++ b/peer/on_tick.go
@@ -41,7 +41,7 @@ func (a *App) onTick() {
 			}
 			// Stale non-public direct peer: demote to probing so WireGuard
 			// resumes handshake attempts on the direct path.
-			a.devAddProbe(p, p.WGEndpoint())
+			a.devAddProbe(p, p.PreferredEndpoint())
 		}
 	}