diff --git a/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/pipelines/gatk/GatkVariantcalling.scala b/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/pipelines/gatk/GatkVariantcalling.scala
index 915371c7265de9ed3ebd9aa7c8589d627590c5d5..b4f8c127c9ff39df392d45bb32ba0556072fbf97 100644
--- a/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/pipelines/gatk/GatkVariantcalling.scala
+++ b/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/pipelines/gatk/GatkVariantcalling.scala
@@ -8,7 +8,7 @@ import nl.lumc.sasc.biopet.extensions.gatk.{ AnalyzeCovariates, BaseRecalibrator
 import nl.lumc.sasc.biopet.extensions.picard.MarkDuplicates
 import org.broadinstitute.gatk.queue.QScript
 import org.broadinstitute.gatk.queue.extensions.gatk.TaggedFile
-import org.broadinstitute.gatk.utils.commandline.{ Input, Output, Argument }
+import org.broadinstitute.gatk.utils.commandline.{ Input, Argument }
 import scala.collection.SortedMap
 import scala.language.reflectiveCalls