diff --git a/course/format/singleactivity/styles.css b/course/format/singleactivity/styles.css
index 65f7875..51506e1 100644
--- a/course/format/singleactivity/styles.css
+++ b/course/format/singleactivity/styles.css
@@ -3,6 +3,7 @@
 are not applicable in single activity course format */
 body.format-singleactivity.path-mod.pagelayout-admin form.mform #fitem_id_showdescription,
 body.format-singleactivity.path-mod.pagelayout-admin form.mform .fitem_actionbuttons#fgroup_id_buttonar #id_submitbutton {display:none;}
+#page-mod-book-edit.format-singleactivity.path-mod.pagelayout-admin form.mform .fitem_actionbuttons#fgroup_id_buttonar #id_submitbutton { display: inline-block !important; }
 
 /* In mod_quiz hide "Back to course" button */
 body.format-singleactivity.path-mod-quiz .quizattempt .continuebutton {display:none;}