diff --git a/gatk.wdl b/gatk.wdl
index dbe4e0c7f29d83e56f117e45c4a2100e6158955a..195627e44b5de984d7d79df93bea926723b1dddc 100644
--- a/gatk.wdl
+++ b/gatk.wdl
@@ -3,6 +3,7 @@ task ApplyBQSR {
     String? preCommand
     File gatkJar
     File inputBam
+    File inputBamIndex
     String outputBamPath
     File recalibrationReport
     Array[File]+ sequenceGroupInterval