diff --git a/vars/uploadDraftset.groovy b/vars/uploadDraftset.groovy
index ac5a53c..2fcfce6 100644
--- a/vars/uploadDraftset.groovy
+++ b/vars/uploadDraftset.groovy
@@ -5,7 +5,7 @@
         String credentials = config['credentials']
         String PIPELINE = config['pipeline_api']
         if (!mapping) {
-            if (fileExists 'metadata/columns.csv') {
+            if (fileExists('metadata/columns.csv')) {
                 mapping = 'metadata/columns.csv'
             } else {
                 mapping = config['default_mapping']