diff --git a/gatk.wdl b/gatk.wdl
index d4613d9c93d7cbf8df2c69f66d4f6cf2862f28d4..8107d1e40b8c70cfb911125e321f0accc64c38d4 100644
--- a/gatk.wdl
+++ b/gatk.wdl
@@ -253,6 +253,7 @@ task SplitNCigarReads {
     String? preCommand
 
     File input_bam
+    File input_bam_index
     File ref_fasta
     File ref_fasta_index
     File ref_dict