diff --git a/hand_control/launch/essai-estimator.launch b/hand_control/launch/essai-estimator.launch
index 4995032..6880ad2 100644
--- a/hand_control/launch/essai-estimator.launch
+++ b/hand_control/launch/essai-estimator.launch
@@ -5,4 +5,6 @@
     <remap from="/estimator/input" to="/filtre/output"/>
   </node>
 
+  <param name="/random/freq" value="100." type="double" />
+
 </launch>