diff --git a/Export-configuration-password-to-env-variable-and-only-remember-it-for-some-time.md b/Export-configuration-password-to-env-variable-and-only-remember-it-for-some-time.md
index ced1ab7..c785f54 100644
--- a/Export-configuration-password-to-env-variable-and-only-remember-it-for-some-time.md
+++ b/Export-configuration-password-to-env-variable-and-only-remember-it-for-some-time.md
@@ -11,7 +11,7 @@ echo "Password:"
 read -s RCLONE_CONFIG_PASS
 export RCLONE_CONFIG_PASS
 
-if [ -n $RCLONE_PASS_TIMEOUT ]; then
+if [ -n "$RCLONE_PASS_TIMEOUT" ]; then
   pid=$$
   trap 'unset RCLONE_CONFIG_PASS' SIGALRM
   ( ( sleep $RCLONE_PASS_TIMEOUT ; kill -ALRM $pid ) & )