diff --git a/bin/rucio_env.sh b/bin/rucio_env.sh
index 21a434c4..9ac618ae 100755
--- a/bin/rucio_env.sh
+++ b/bin/rucio_env.sh
@@ -2,5 +2,6 @@
 # returns the two env. variables needed to make Rucio client work
 # on the current OS
 unset PYTHONPATH
+eval `scram unsetenv -sh`
 source /cvmfs/cms.cern.ch/rucio/setup-py3.sh > /dev/null
 echo $RUCIO_HOME $PYTHONPATH