diff --git a/SAS/TMSS/backend/src/Dockerfile-tmss b/SAS/TMSS/backend/src/Dockerfile-tmss
index 25dcf810a99b010e90d1e6bf3a2f9f11700915b9..d471d73bac7fe77a42b2035b7c9016e495067614 100644
--- a/SAS/TMSS/backend/src/Dockerfile-tmss
+++ b/SAS/TMSS/backend/src/Dockerfile-tmss
@@ -7,8 +7,10 @@
 #
 # docker build [-t image_name:tag] -f docker/Dockerfile-tmss .
 #
-FROM ci_scu:$TMSS_VERSION
 ARG TMSS_VERSION=latest
+
+FROM ci_scu:$TMSS_VERSION
+
 ARG TMSS_COPY_DIR="./installed"
 
 USER lofarsys