diff --git a/course/format/topics/commands.php b/course/format/topics/commands.php
index c166b9cf606..76322c1b402 100644
--- a/course/format/topics/commands.php
+++ b/course/format/topics/commands.php
@@ -14,7 +14,7 @@ $instanceid = optional_param('instanceId', 0, PARAM_INT);
 $value      = optional_param('value', 0, PARAM_INT);
 $column     = optional_param('column', 0, PARAM_ALPHA);
 $id         = optional_param('id', 0, PARAM_INT);
-$summary    = optional_param('summary', '', PARAM_ALPHA);
+$summary    = optional_param('summary', '', PARAM_RAW);
 $sequence   = optional_param('sequence', '', PARAM_SEQUENCE);
 $visible    = optional_param('visible', 0, PARAM_INT);