diff --git a/Jenkinsfile b/Jenkinsfile
index 7b07e14e8..84749c24f 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -3,7 +3,7 @@ pipeline {
     stages {
         stage('build') {
             steps {
-              sh "contrib/docker/build.sh -o aarch64-linux-gnu blackcoinnl github CoinBlack" + env.GIT_LOCAL_BRANCH + "Etc/UTC"
+              sh "contrib/docker/build.sh -o aarch64-linux-gnu blackcoinnl github CoinBlack " + env.GIT_LOCAL_BRANCH + " Etc/UTC"
             }
         }
     }