diff --git a/public/biopet-extentsions/src/main/scala/nl/lumc/sasc/biopet/extensions/samtools/SamtoolsSort.scala b/public/biopet-extentsions/src/main/scala/nl/lumc/sasc/biopet/extensions/samtools/SamtoolsSort.scala
index cb1f72d8d765207fdf80d23ba755a8d1720315fb..3ec14161a054babc9deaa3a5f6fc41d04ce5e095 100644
--- a/public/biopet-extentsions/src/main/scala/nl/lumc/sasc/biopet/extensions/samtools/SamtoolsSort.scala
+++ b/public/biopet-extentsions/src/main/scala/nl/lumc/sasc/biopet/extensions/samtools/SamtoolsSort.scala
@@ -27,10 +27,11 @@ class SamtoolsSort(val root: Configurable) extends Samtools {
     prefix = config("prefix", default = new File(Files.createTempDir(), output.getAbsolutePath))
   }
 
-  def cmdLine = executable + required("sort") +
+  def cmdLine = required(executable) + required("sort") +
     optional("-m", (coreMemeory + "G")) +
     optional("-@", threads) +
     optional("-O", outputFormat) +
+    required("-T", prefix) +
     conditional(sortByName, "-n") +
     (if (outputAsStsout) "" else required("-o", output)) +
     (if (inputAsStdin) "" else required(input))