diff --git a/workflow/scripts/convert_reads.py b/workflow/scripts/convert_reads.py
index e091296b50b04635b6bfef68ec51dd110b96c886..d7450475c5be71023c365aa6dfecfd3ddb0ddc7e 100644
--- a/workflow/scripts/convert_reads.py
+++ b/workflow/scripts/convert_reads.py
@@ -109,7 +109,7 @@ def main():
     bam_basename = os.path.basename(
         utils.strip_extensions(bam, ['.bam']))
 
-    tag_filename = bam_basename + 'tagAlign.gz'
+    tag_filename = bam_basename + '.tagAlign.gz'
     convert_mapped(bam, tag_filename)
 
     if paired:  # paired-end data