diff --git a/packages/GATK-GSA-Pipeline.xml b/packages/GATK-GSA-Pipeline.xml
index 77fb6025c..843a23dc4 100644
--- a/packages/GATK-GSA-Pipeline.xml
+++ b/packages/GATK-GSA-Pipeline.xml
@@ -27,6 +27,7 @@
       <class>org.broadinstitute.sting.gatk.walkers.recalibration.CycleCovariate</class>
       <class>org.broadinstitute.sting.gatk.walkers.recalibration.ReadGroupCovariate</class>
       <class>org.broadinstitute.sting.gatk.walkers.recalibration.HomopolymerCovariate</class>
+      <class>org.broadinstitute.sting.gatk.walkers.recalibration.TileCovariate</class>
       <!-- Local realignment around indels -->
       <class>org.broadinstitute.sting.gatk.walkers.indels.CleanedReadInjector</class>
       <class>org.broadinstitute.sting.gatk.walkers.indels.IndelIntervalWalker</class>