diff --git a/Jenkinsfile b/Jenkinsfile
index 133fc185b..d6f7d7b80 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -224,7 +224,7 @@ def BuildCUDA(args) {
     if (args.cuda_version == '9.0') {
       echo 'Stashing Python wheel...'
       stash name: 'xgboost_whl_cuda9', includes: 'python-package/dist/*.whl'
-      path = ("${BRANCH_NAME}" == 'master') ? '/' : "${BRANCH_NAME}/"
+      path = ("${BRANCH_NAME}" == 'master') ? '' : "${BRANCH_NAME}/"
       s3Upload bucket: 'xgboost-nightly-builds', path: path, acl: 'PublicRead', workingDir: 'python-package/dist', includePathPattern:'**/*.whl'
       echo 'Stashing C++ test executable (testxgboost)...'
       stash name: 'xgboost_cpp_tests', includes: 'build/testxgboost'
diff --git a/Jenkinsfile-win64 b/Jenkinsfile-win64
index 3e12b113c..74153140f 100644
--- a/Jenkinsfile-win64
+++ b/Jenkinsfile-win64
@@ -92,7 +92,7 @@ def BuildWin64() {
     """
     echo 'Stashing Python wheel...'
     stash name: 'xgboost_whl', includes: 'python-package/dist/*.whl'
-    path = ("${BRANCH_NAME}" == 'master') ? '/' : "${BRANCH_NAME}/"
+    path = ("${BRANCH_NAME}" == 'master') ? '' : "${BRANCH_NAME}/"
     s3Upload bucket: 'xgboost-nightly-builds', path: path, acl: 'PublicRead', workingDir: 'python-package/dist', includePathPattern:'**/*.whl'
     echo 'Stashing C++ test executable (testxgboost)...'
     stash name: 'xgboost_cpp_tests', includes: 'build/testxgboost.exe'