diff --git a/centrifuge.wdl b/centrifuge.wdl
index 8aaed45ee9a101b2744ee86b1cdb5691f468907e..865bf35f1fa90fbb35b7fc425fe2a3ed49293931 100644
--- a/centrifuge.wdl
+++ b/centrifuge.wdl
@@ -27,7 +27,7 @@ task Build {
         File taxonomyTree
         File nameTable
         File referenceFile
-        String indexBasename = "NAME"
+        String indexBasename = "centrifuge_index"
         String outputPrefix
 
         Int? offrate