diff --git a/biopet.wdl b/biopet.wdl
index a97d99819e657c4fd2115c43f1924dcb728ddc16..18fda742f321b20845824ac61f4758a65ed8236f 100644
--- a/biopet.wdl
+++ b/biopet.wdl
@@ -375,7 +375,7 @@ task ValidateVcf {
     String? preCommand
     File? toolJar
     File vcfFile
-    File vcfindex
+    File vcfIndex
     File refFasta
     File refFastaIndex
     File refDict