diff --git a/Jenkinsfile b/Jenkinsfile
index 911a0fa..561fbff 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -33,7 +33,7 @@ pipeline {
                       def build_arg = '--no-cache ' +
                                       "--build-arg COMANAGE_REGISTRY_VERSION=$version " +
                                       "-f ./$directory/Dockerfile ./$directory"
-                      def base_image = docker.build($image, $build_arg)
+                      def base_image = docker.build("$image", "$build_arg")
                       //def comanage_registry_base_image = docker.build("comanage-registry-base:$version-1", "--no-cache --build-arg COMANAGE_REGISTRY_VERSION=$version -f ./comanage-registry-base/Dockerfile ./comanage-registry-base")
                       //def comanage_registry_internet2_tap_base_image = docker.build("comanage-registry-internet2-tier-base:1", "--no-cache -f ./comanage-registry-internet2-tier-base/Dockerfile ./comanage-registry-internet2-tier-base")
                       //def comanage_registry_internet2_tap_image = docker.build("comanage-registry", "--no-cache --build-arg COMANAGE_REGISTRY_VERSION=$version --build-arg COMANAGE_REGISTRY_BASE_IMAGE_VERSION=1 --build-arg COMANAGE_REGISTRY_I2_BASE_IMAGE_VERSION=1 -f ./comanage-registry-internet2-tier/Dockerfile ./comanage-registry-internet2-tier")