diff --git a/Jenkinsfile b/Jenkinsfile
index 0eed555653..4fa5618dfe 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -20,7 +20,7 @@ pipeline {
         stage('Print env variables') {
             steps {
                 script {
-                    echo $cron_string
+                    echo "$cron_string"
                     echo cron_string
                     echo JOB_NAME
                     echo env.JOB_NAME