diff --git a/scripts/speed_reader.py b/scripts/speed_reader.py
index a981ea7..0606149 100644
--- a/scripts/speed_reader.py
+++ b/scripts/speed_reader.py
@@ -7,6 +7,7 @@ from scripts.speed_controller import rpm_control
 pulses_per_rotation = 4
 reader = Button(4, pull_up=False, bounce_time=0.0005)
 set_variable("speed_reader_last_impulse_time", datetime.datetime.now(), False)
+set_variable("actual_rpm_unfiltered", 0, False)
 
 
 def event():