diff --git a/analytics/classes/local/indicator/community_of_inquiry_activity.php b/analytics/classes/local/indicator/community_of_inquiry_activity.php
index 5deaeb6049e..555bb420e7c 100644
--- a/analytics/classes/local/indicator/community_of_inquiry_activity.php
+++ b/analytics/classes/local/indicator/community_of_inquiry_activity.php
@@ -836,7 +836,8 @@ abstract class community_of_inquiry_activity extends linear {
         // When the course is using format weeks we use the week's end date.
         $format = course_get_format($activity->get_modinfo()->get_course());
         // We should change this in MDL-60702.
-        if (method_exists($format, 'get_section_dates')) {
+        if (get_class($format) == 'format_weeks' || is_subclass_of($format, 'format_weeks')
+             && method_exists($format, 'get_section_dates')) {
             $dates = $format->get_section_dates($section);
 
             // We need to consider the +2 hours added by get_section_dates.