diff --git a/pid/README b/pid/README
index 93e48f3..7c3f919 100644
--- a/pid/README
+++ b/pid/README
@@ -3,7 +3,7 @@
 what was published in the Chrome OS source.
 
 One has any number of ThermalControllers that run through a PID step to
-generate a set-point RPM to reach its thermal set-point.  The maximum ouput
+generate a set-point RPM to reach its thermal set-point.  The maximum output
 from the set of ThermalControllers is taken as the input to all the
 FanController PID loops.