diff --git a/measles_virus.nf b/measles_virus.nf
index 86e3dc52ce47a1c0c6ed2a6c192ef85f68d2f7a1..171b33dd090c9ae3f8421a0ec308c05d77e1b8e9 100644
--- a/measles_virus.nf
+++ b/measles_virus.nf
@@ -142,7 +142,7 @@ process extract_snp {
     output:
     file("*_snp*.tsv") into snpChannel
     file("*_mpileup.vcf.gz") into vcfChannel
-    file("*_nodup.bam"
+    file("*_nodup.bam") into nodupbam
 
     script:
     """
@@ -210,6 +210,7 @@ process compute_frequencies {
                                         round(frequency, 3)), file=output)
     """
 }
+
 process counts_measles {
     //publishDir "$myDir", mode: 'copy'
     memory "2G"