diff --git a/smwrappers/map_on_genome/wrapper.py b/smwrappers/map_on_genome/wrapper.py
index 61270ab71a6278d3b1b51e4c96719634b7db5d68..b0edcad8f77dc6baa9ff558cf9b2f8383cce7f5e 100644
--- a/smwrappers/map_on_genome/wrapper.py
+++ b/smwrappers/map_on_genome/wrapper.py
@@ -55,6 +55,6 @@ if hasattr(snakemake.output, "methods"):
     shell(f"cp {snakemake.input.methods} {snakemake.output.methods}")
     methods = f"The {snakemake.params.read_name} were mapped on the {snakemake.params.genome_name} using {snakemake.params.aligner} (version ${{{{v}}}}) with options {snakemake.params.settings}"
     shell(f"""
-        v=$({snakemake.params.aligner} --version | head -1 | awk '{{print $3}}')
+        v=$({snakemake.params.aligner} --version | head -1 | awk '{{{{print $3}}}}')
         echo "{methods}" >> {snakemake.output.methods}
 """)