diff --git a/classes/badgeinfo.php b/classes/badgeinfo.php
index dcacdff..b3c4ae1 100644
--- a/classes/badgeinfo.php
+++ b/classes/badgeinfo.php
@@ -816,7 +816,7 @@ class badgeinfo {
         $sql = "SELECT DISTINCT b.id from {badge} b
             INNER JOIN {badge_criteria} crit ON b.id = crit.badgeid
             INNER JOIN {badge_criteria_param} p on p.critid = crit.id
-            INNER JOIN {competency_coursecomp} cc on cc.competencyid = p.value
+            INNER JOIN {competency_coursecomp} cc on CAST(cc.competencyid as VARCHAR(255)) = p.value
             WHERE cc.courseid = :courseid AND crit.criteriatype $ctypesql $conditions";
 
         $competencyrelids = $DB->get_fieldset_sql($sql, $sqlparams);