diff --git a/minimap.py b/minimap.py
index 9c0d605..b8547a2 100644
--- a/minimap.py
+++ b/minimap.py
@@ -123,7 +123,7 @@ def update_display():
             b = bearing(lavg, (val[0][0],val[0][1]))
         else:
             d = float('inf')
-            b = math.nan
+            b = float('NaN')
         print(name, ":", d, b)
         du = "m" if math.isinf(d) else ""
         bu = "°" if math.isnan(b) else ""