diff --git a/Docker/lofar-tbbwriter-control/Dockerfile.tmpl b/Docker/lofar-tbbwriter-control/Dockerfile.tmpl
index 7b91f07a652c09e9e4506940ffa4d22ae16d9780..438a0858365a77947f1ffc51c35dddc2da7b3c6a 100644
--- a/Docker/lofar-tbbwriter-control/Dockerfile.tmpl
+++ b/Docker/lofar-tbbwriter-control/Dockerfile.tmpl
@@ -101,7 +101,7 @@ RUN aptitude install -y libncurses${NCURSES_VERSION} liblog4cplus-${LIBLOG4CPLUS
     aptitude autoclean
 
 # Apply a finger print to force a rebuild if the source code changes. Supply a unique ID here to force a rebuild.
-ARG LOFAR_FINGERPRINT=whatever
+ARG LOFAR_FINGERPRINT=V2.1
 ENV LOFAR_FINGERPRINT=${LOFAR_FINGERPRINT}
 
 # Install