diff --git a/subworkflows/local/mirtrace.nf b/subworkflows/local/mirtrace.nf
index 0d775a70..8a87e1c1 100644
--- a/subworkflows/local/mirtrace.nf
+++ b/subworkflows/local/mirtrace.nf
@@ -15,7 +15,7 @@ workflow MIRTRACE {
     ch_mirtrace_config =
     reads.map { adapter, ids, reads -> [ids,reads]}
     .transpose()
-    .collectFile { id, path -> "./${path.getFileName().toString()}",id,,"${params.phred_offset}\n" } // operations need a channel, so, should be outside the module
+    .collectFile { id, path -> "./${path.getFileName().toString()},${id},,${params.phred_offset}\n" } // operations need a channel, so, should be outside the module
 
     MIRTRACE_RUN (
         reads,