diff --git a/src/nf_modules/ucsc/main.nf b/src/nf_modules/ucsc/main.nf
index 6e3ebc19cfc6d124b3747b649488b19bfff03435..323536a03a03ecdf861a56ea83f3ae6961e08014 100644
--- a/src/nf_modules/ucsc/main.nf
+++ b/src/nf_modules/ucsc/main.nf
@@ -49,7 +49,7 @@ process bigwig_to_wig {
 
   script:
 """
-bigWigToWig ${params.bigwig_to_wig} - \
+bigWigToWig ${params.bigwig_to_wig} \
   ${bg} \
   ${bg.simpleName}.wig
 """
@@ -73,10 +73,10 @@ process bigwig2_to_wig2 {
 
   script:
 """
-bigWigToWig ${params.bigwig_to_wig} - \
+bigWigToWig ${params.bigwig_to_wig} \
   ${bw_a} \
   ${bw_a.simpleName}.wig
-bigWigToWig ${params.bigwig_to_wig} - \
+bigWigToWig ${params.bigwig_to_wig} \
   ${bw_b} \
   ${bw_b.simpleName}.wig
 """