diff --git a/Jenkinsfile.groovy b/Jenkinsfile.groovy
index f6f2a77c..b05f41e4 100644
--- a/Jenkinsfile.groovy
+++ b/Jenkinsfile.groovy
@@ -17,7 +17,11 @@ pipeline {
     stages {
 
         stage('Preparing') {
-            when(expression: { env.GIT_BRANCH == 'master-beta' })
+            when {
+                expression {
+                    return env.GIT_BRANCH == "master-beta"
+                }
+            }
             steps {
                 powershell """
                     # Percorso del file build.gradle