diff --git a/cps/basic.py b/cps/basic.py
index b01210109..fdf453a04 100644
--- a/cps/basic.py
+++ b/cps/basic.py
@@ -19,7 +19,6 @@
# along with this program. If not, see
{{ _("Book %(index)s of %(range)s", index=entry.series_index | formatfloat(2), range=(entry.series[0].name)|safe) }}
+{{ _("Book %(index)s of %(range)s", index=entry.series_index|formatfloat(2), range=entry.series[0].name|e) }}
{% endif %} {% if entry.languages|length > 0 %}