diff --git a/src/nf_modules/bwa/main.nf b/src/nf_modules/bwa/main.nf
index 42cd607780a4118491e4612e74cdeb93f032fc5a..67ab922755786b7856c7df2922eb7a0c166ea457 100644
--- a/src/nf_modules/bwa/main.nf
+++ b/src/nf_modules/bwa/main.nf
@@ -38,7 +38,7 @@ process mapping_fastq {
   script:
 """
 bwa mem -t ${task.cpus} \
--R ${bwa_mem_R} \
+-R ${params.bwa_mem_R} \
 ${index_id} ${reads[0]} ${reads[1]} 2> \
   ${file_id}_bwa_report.txt | \
   samtools view -@ ${task.cpus} -Sb - > ${file_id}.bam