diff --git a/SAS/TMSS/backend/src/Dockerfile-tmss b/SAS/TMSS/backend/src/Dockerfile-tmss
index b3cae8d7e90a1f571c997973ea15cf837f8e0dbd..f742be131dbadcd4eb4568af2c81ba506960463c 100644
--- a/SAS/TMSS/backend/src/Dockerfile-tmss
+++ b/SAS/TMSS/backend/src/Dockerfile-tmss
@@ -20,6 +20,11 @@ ENV LOFARROOT=/opt/lofar
 
 # Add the rest of the code
 COPY --chown=lofarsys:lofarsys ./installed /opt/lofar
+
+# docker only chowns the copied dir, not the full tree
+RUN chown -R lofarsys:lofarsys /opt/lofar
+
+# magic path manipulation
 RUN sed -i "s/lfr_root=.*/lfr_root=\/opt\/lofar/g" /opt/lofar/lofarinit.sh
 
 # Make port 8000,8008 available for the app