diff --git a/src/main.nf b/src/main.nf
index 4d13e99aee9fdb44898adf00dd992d18474b2ed9..768dbdcdb6a060ca4f3189eed8ca78af04d1f6db 100644
--- a/src/main.nf
+++ b/src/main.nf
@@ -22,5 +22,5 @@ Channel.fromPath( file(params.csv) )
 workflow {
   SPLIT(fastq.r1.mix(fastq.r2))
   FASTKMERS(SPLIT.out.fastq.transpose())
-  MERGEKMER(FASTKMERS.out.csv.view())
+  MERGEKMER(FASTKMERS.out.csv.groupTuple().view())
 }