diff --git a/telemetry/code/monitor/graph_plotter_rewrite.py b/telemetry/code/monitor/graph_plotter_rewrite.py
index 9b72351..eb4a021 100755
--- a/telemetry/code/monitor/graph_plotter_rewrite.py
+++ b/telemetry/code/monitor/graph_plotter_rewrite.py
@@ -37,6 +37,7 @@ plots = []
 plots.append(Plot("This is a test plot"))
 
 def pollSerial(foo):
+    # Note, foo seems to be a float
     pass
 
 pyglet.clock.schedule_interval(pollSerial, 0.1)
--
libgit2 0.21.2