diff --git a/src/RNAseq_sen1D.nf b/src/RNAseq_sen1D.nf
index e2eaf7715c00f39885c41e8cc86edd29c97d7a6d..361028cbac69bfc533ab40bd24c6a5aed0517252 100644
--- a/src/RNAseq_sen1D.nf
+++ b/src/RNAseq_sen1D.nf
@@ -158,7 +158,7 @@ fi
 
 /*                      bams sorting                                    */
 process sort_bam {
-  tag "$bam.baseName"
+  tag "${pair_id}.bam"
   cpus 4
 
   input: