diff --git a/doc/starterkit/k4MarlinWrapperCLIC/Readme.md b/doc/starterkit/k4MarlinWrapperCLIC/Readme.md
index c26edafe..9a8980f1 100644
--- a/doc/starterkit/k4MarlinWrapperCLIC/Readme.md
+++ b/doc/starterkit/k4MarlinWrapperCLIC/Readme.md
@@ -108,6 +108,7 @@ during [Simulation](#simulation).
 ```bash
 cd CLICPerformance/clicConfig
 
+sed -i `1s/^/import os\n/` clicReconstruction.py
 sed -i 's;read.Files = \[".*"\];read.Files = \["ttbar.slcio"\];' clicReconstruction.py
 sed -i 's;EvtMax   = 10,;EvtMax   = 3,;' clicReconstruction.py
 sed -i 's;"MaxRecordNumber": ["10"],;"MaxRecordNumber": ["3"],;' clicReconstruction.py