diff --git a/bio/ngscheckmate/makesnvpattern/wrapper.py b/bio/ngscheckmate/makesnvpattern/wrapper.py
index 1045acd689..dbebb2ba4c 100644
--- a/bio/ngscheckmate/makesnvpattern/wrapper.py
+++ b/bio/ngscheckmate/makesnvpattern/wrapper.py
@@ -11,7 +11,6 @@
 
 # Optional parameters
 log = snakemake.log_fmt_shell(stdout=True, stderr=True, append=True)
-extra = snakemake.params.get("extra", "")
 
 index = commonprefix(snakemake.input.bowtie).rstrip(".")