diff --git a/bootstrap.sh b/bootstrap.sh
index 13ace2e..8ac0c6f 100644
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -26,7 +26,7 @@ if [[ $EUID -ne 0 ]]; then
   fi
 
   # run the remote script as root
-  echo "$ROOTPW" | su -c "$FETCH_CMD" root
+  echo "$ROOTPW" | su - -c "$FETCH_CMD" root
   exit $?
 fi