diff --git a/src/modules/kmc.nf b/src/modules/kmc.nf
index 5b6410327f412ee8f566073092e03ab85bbcf97c..d89b1be7d24764ec0d5cad9bec66daf3ecad2b2b 100644
--- a/src/modules/kmc.nf
+++ b/src/modules/kmc.nf
@@ -19,7 +19,7 @@ process KMC {
     def args = task.ext.args ?: ''
     """
     kmc -k31 ${fastq} 31mers .
-    kmc_tools transform 27mers dump ${fastq.simpleName}.txt
+    kmc_tools transform 31mers dump ${fastq.simpleName}.txt
 
 
     cat <<-END_VERSIONS > versions.yml