diff --git a/course_reserves/course-details.pl b/course_reserves/course-details.pl
index af1eb62337..a9ffe2c421 100755
--- a/course_reserves/course-details.pl
+++ b/course_reserves/course-details.pl
@@ -60,6 +60,7 @@ my $course_reserves = GetCourseReserves(
 $template->param(
     course          => $course,
     course_reserves => $course_reserves,
+    count           => scalar @$course_reserves,
 );
 
 output_html_with_http_headers $cgi, $cookie, $template->output;
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/course_reserves/course-details.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/course_reserves/course-details.tt
index e07cbe538e..1600824827 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/course_reserves/course-details.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/course_reserves/course-details.tt
@@ -23,7 +23,13 @@
         });
 
         $("#delete_course").click(function(){
-            return confirm( _("Are you sure you want to delete this course?") );
+            [% IF count == 1 %]
+                return confirmDelete(_("Are you sure you want to delete this course? There is [% count %] attached item.") );
+            [% ELSIF count != 1 && count > 0 %]
+                return confirmDelete(_("Are you sure you want to delete this course? There are [% count %] attached items.") );
+            [% ELSE %]
+                return confirmDelete(_("Are you sure you want to delete this course?"));
+            [% END %]
         });
         $(".disabled").tooltip().on("click", function(e){
             e.preventDefault();