diff --git a/vars/uploadTidy.groovy b/vars/uploadTidy.groovy
index f6278aa..0506870 100644
--- a/vars/uploadTidy.groovy
+++ b/vars/uploadTidy.groovy
@@ -1,4 +1,4 @@
-def call(csvs, String mapping=null, oldLabel=null) {
+def call(csvs, String mapping=null, String oldLabel=null) {
     configFileProvider([configFile(fileId: 'pmd', variable: 'configfile')]) {
         def config = readJSON(text: readFile(file: configfile))
         String PMD = config['pmd_api']
@@ -60,4 +60,4 @@
             ])
         }
     }
-}
\ No newline at end of file
+}