diff --git a/conf/modules.config b/conf/modules.config
index b858ec3..df90c38 100644
--- a/conf/modules.config
+++ b/conf/modules.config
@@ -391,6 +391,7 @@ process {
     }
 
     withName: MOTUS_PROFILE {
+        ext.prefix = params.perform_runmerging ? { "${meta.id}-${meta.db_name}" } : { "${meta.id}-${meta.run_accession}-${meta.db_name}" }
         publishDir = [
             path: { "${params.outdir}/motus/${meta.db_name}" },
             mode: params.publish_dir_mode