diff --git a/thorlcr/activities/external/thexternalslave.cpp b/thorlcr/activities/external/thexternalslave.cpp
index 276b07dfd9b..6d80f697c1e 100644
--- a/thorlcr/activities/external/thexternalslave.cpp
+++ b/thorlcr/activities/external/thexternalslave.cpp
@@ -79,6 +79,7 @@ class CExternalSlaveActivity : public CSlaveActivity
     }
     virtual void start() override
     {
+        ActivityTimer t(slaveTimerStats, timeActivities);
         //Cannot call base base start because that will error if > 1 input
         startAllInputs();
         dataLinkStart();