diff --git a/wetb/control/control.py b/wetb/control/control.py
index 1d378c53f2df0293b14d089053abef7ba2711db5..ed9c9c65d6bacb569059ce6a57cb2fac735f6e09 100644
--- a/wetb/control/control.py
+++ b/wetb/control/control.py
@@ -25,7 +25,8 @@ class Control(object):
         Parameters
         ----------
         pitch: array
-            Pitch angle [deg]
+            Pitch angle [deg]. The values should only be those of the full load
+            region.
         I: array
             Drivetrain inertia [kg*m**2]
         dQdt: array