diff --git a/workflow/rna-seq.nf b/workflow/rna-seq.nf
index 41e11c785655f92c1ed756f0c9ba493e4d550d0f..4dcff2bd0f50b5f3bdcc51e1cf1af9eb401926a5 100644
--- a/workflow/rna-seq.nf
+++ b/workflow/rna-seq.nf
@@ -381,7 +381,7 @@ process getRefInfer {
 
   input:
     path credential, stageAs: "credential.json" from deriva_getRefInfer
-    val refName from referenceInfer
+    each val refName from referenceInfer
 
   output:
     tuple val (refName), path ("hisat2", type: 'dir'), path ("*.fna"), path ("*.gtf")  into refInfer