diff --git a/flatcar_workon b/flatcar_workon
index 857cb64e19..19bbee4eb0 100755
--- a/flatcar_workon
+++ b/flatcar_workon
@@ -22,7 +22,7 @@ set -euo pipefail
 # If both board and host are specified, just use host, because board
 # does not have to be specified and may come from default, in which
 # case there's no way to override.
-if [[ -n ${FLAGS_board} ]] && [[ ${FLAGS_host} = "${FLAGS_TRUE}" ]]; then
+if [[ -n ${FLAGS_board} && ${FLAGS_host} = "${FLAGS_TRUE}" ]]; then
   unset FLAGS_board # kill board
 fi