diff --git a/srv/TSTExecutorCost.srv b/srv/TSTExecutorCost.srv
index 9ea404a0f1fdd100c200b39c63f5cddbf0ad7f9e..7fe5c99471495c88c9255acf52bc1cbde22c63b5 100644
--- a/srv/TSTExecutorCost.srv
+++ b/srv/TSTExecutorCost.srv
@@ -2,7 +2,7 @@
 # Call the check function in the executor.
 #
 
-lrs_msgs_tst/TSTNodeInfo tni
+string json_tst_node
 ---
 int32 cost
 bool success    # True means that the delegation check succeeded