diff --git a/playbooks/mpdf.yaml b/playbooks/mpdf.yaml
index f3ff089..61cf1e8 100644
--- a/playbooks/mpdf.yaml
+++ b/playbooks/mpdf.yaml
@@ -5,7 +5,7 @@
     count: 5
     path: /var/lib/
     mpd: mpd
-    service_name: "{{  mpd + item  }}"
+    service_name: "{{ "mpd" ~ item  }}"
     add_path: "{{ path ~ service_name }}"
     playlist_directory: "{{ add_path ~ 'playlist/' }}"
     db_file: tag_cache