cleaned up some more timing kind of stuff
diff --git a/aos/common/control_loop/ControlLoop.h b/aos/common/control_loop/ControlLoop.h
index 723d766..05f8902 100644
--- a/aos/common/control_loop/ControlLoop.h
+++ b/aos/common/control_loop/ControlLoop.h
@@ -37,7 +37,7 @@
 };
 
 // Control loops run this often, "starting" at time 0.
-const time::Time kLoopFrequency = time::Time::InSeconds(0.01);
+constexpr time::Time kLoopFrequency = time::Time::InSeconds(0.01);
 
 // Calculates the next time to run control loops after start.
 time::Time NextLoopTime(time::Time start = time::Time::Now());