diff --git a/da/rc/da.rc b/da/rc/da.rc
index 4f2304ca875dc8bdf620a6637266b25cea80469e..33b7c60cff5b46127b89891e5f711a2d3165bac9 100644
--- a/da/rc/da.rc
+++ b/da/rc/da.rc
@@ -17,5 +17,5 @@ da.system.rc        : da/rc/carbontracker.rc
 
 da.obsoperator         : TM5
 da.obsoperator.rc      : ${HOME}/Modeling/TM5/tm5-ctdas.rc
-da.obsoperator.nthreads  : 2
+da.obsoperator.threads  : 2
 da.optimizer.nmembers  : 100