diff --git a/Jenkinsfile.eval b/Jenkinsfile.eval
index a026e28..e6f26b9 100644
--- a/Jenkinsfile.eval
+++ b/Jenkinsfile.eval
@@ -35,7 +35,7 @@ pipeline {
                 sh 'python3 ./src/evalScript.py'
                 archiveArtifacts 'trainResults.csv'
                 script {
-                    metric = sh (
+                    def metric = sh (
                         script: 'trainResults.csv',
                         returnStdout: true
                         ).trim()