diff --git a/workflows/kallisto/kallisto-workflow.cwl b/workflows/kallisto/kallisto-workflow.cwl
index c0e074e8d8c1cdf6f5187ea90c4cb9a12373beb9..0cf46eb9a97c5cd0a9bc65e5f819ff55cd9bad2f 100644
--- a/workflows/kallisto/kallisto-workflow.cwl
+++ b/workflows/kallisto/kallisto-workflow.cwl
@@ -39,7 +39,7 @@ steps:
       InputReads: InputReadsMultipleSamples
       QuantOutfolder:
         source: InputReadsMultipleSamples
-        valueFrom: $(self[0].nameroot)
+        valueFrom: $(self[0].nameroot.substring(0,6))
       Index: index/index
       isSingle: isSingle
       FragmentLength: FragmentLength