diff --git a/Jenkinsfile b/Jenkinsfile
index e1a560e..5ce94ac 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -165,10 +165,10 @@ PY
               \"redis-photon:harbor-redis\" \\
               \"nginx-photon:harbor-nginx\" \\
               \"registry-photon:harbor-registry\"; do
-              pair_src=\"${pair%%:*}\"
-              pair_dst=\"${pair##*:}\"
-              src=\"${IMAGE_NAMESPACE}/${pair_src}:${env.HARBOR_VERSION_RESOLVED}${TAG_SUFFIX}.${BUILD_NUMBER}\"
-              dst=\"${IMAGE_NAMESPACE}/${pair_dst}:${env.HARBOR_VERSION_RESOLVED}${TAG_SUFFIX}.${BUILD_NUMBER}\"
+              pair_src=\"\\${pair%%:*}\"
+              pair_dst=\"\\${pair##*:}\"
+              src=\"${IMAGE_NAMESPACE}/\\${pair_src}:${env.HARBOR_VERSION_RESOLVED}${TAG_SUFFIX}.${BUILD_NUMBER}\"
+              dst=\"${IMAGE_NAMESPACE}/\\${pair_dst}:${env.HARBOR_VERSION_RESOLVED}${TAG_SUFFIX}.${BUILD_NUMBER}\"
               if podman image exists \"$src\"; then
                 podman tag \"$src\" \"$dst\" || true
               fi