diff --git a/src/modules/mergekmer.nf b/src/modules/mergekmer.nf
index 35fd56dfebaf954b17e4dc8156fb2ca5cff23098..df60a290cad7fe640bbb207a0b508bd8704c68da 100644
--- a/src/modules/mergekmer.nf
+++ b/src/modules/mergekmer.nf
@@ -36,13 +36,13 @@ process COLLATEKMER {
     path(csv)
 
     output:
-    tuple path("*.csv"), emit: csv
+    path("*.csv"), emit: csv
     path "versions.yml", emit: versions
 
     script:
     def args = task.ext.args ?: ''
     """
-    mergekmer --csv ${csv} --output final.csv --collate
+    mergekmer --csv ${csv} --output ${csv[1].simpleName}.csv --collate
 
 
     cat <<-END_VERSIONS > versions.yml