diff --git a/Jenkinsfile b/Jenkinsfile
index c7a7e66..80ea4a2 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,4 +1,4 @@
-def filename = 'manifest-' + ${branch} + '.xml'
+def filename = 'manifest-${branch}.xml'
 
 timeout (time: 240) {
     node ('build') {