diff --git a/srv/ExecuteKnownTrajectory.srv b/srv/ExecuteKnownTrajectory.srv
index 2462f65..8c01682 100644
--- a/srv/ExecuteKnownTrajectory.srv
+++ b/srv/ExecuteKnownTrajectory.srv
@@ -1,3 +1,6 @@
+# This service is deprecated and will go away at some point. For new development use the ExecuteTrajectory action.
+# Effective since: Indigo 0.7.4, Jade and Kinetic 0.8.3
+
 # The trajectory to execute 
 RobotTrajectory trajectory