diff --git a/minimap.py b/minimap.py
index 6874ad2..9c0d605 100644
--- a/minimap.py
+++ b/minimap.py
@@ -123,9 +123,11 @@ def update_display():
             b = bearing(lavg, (val[0][0],val[0][1]))
         else:
             d = float('inf')
-            b = float('NaN')
+            b = math.nan
         print(name, ":", d, b)
-        display.text(f"{name}: {d:.0f}m {b:.0f}°", 0, 10*(i+1), 1)
+        du = "m" if math.isinf(d) else ""
+        bu = "°" if math.isnan(b) else ""
+        display.text(f"{name}: {d:.0f}{du} {b:.0f}{bu}", 0, 10*(i+1), 1)
     display.show()