diff --git a/lib/tracker/mode_s/frame.go b/lib/tracker/mode_s/frame.go
index e4c78f95..98b8b4a0 100644
--- a/lib/tracker/mode_s/frame.go
+++ b/lib/tracker/mode_s/frame.go
@@ -664,7 +664,7 @@ func (f *Frame) AltitudeStr() string {
 		return ""
 	}
 
-	return fmt.Sprintf("%d %s M=%t, Q=%t", f.altitude, f.AltitudeUnits(), f.acM, f.acQ)
+	// return fmt.Sprintf("%d %s M=%t, Q=%t", f.altitude, f.AltitudeUnits(), f.acM, f.acQ)
 	return fmt.Sprintf("%d %s", f.altitude, f.AltitudeUnits())
 }