diff --git a/course/mod.php b/course/mod.php
index 9921d86..89c1b68 100644
--- a/course/mod.php
+++ b/course/mod.php
@@ -28,7 +28,7 @@
 
 $sectionreturn = optional_param('sr', 0, PARAM_INT);
 $add           = optional_param('add', '', PARAM_ALPHA);
-$type          = optional_param('type', '', PARAM_ALPHA);
+$type          = optional_param('type', '', PARAM_ALPHANUMEXT);
 $indent        = optional_param('indent', 0, PARAM_INT);
 $update        = optional_param('update', 0, PARAM_INT);
 $duplicate     = optional_param('duplicate', 0, PARAM_INT);
@@ -70,7 +70,7 @@
 if (!empty($add)) {
     $id          = required_param('id', PARAM_INT);
     $section     = required_param('section', PARAM_INT);
-    $type        = optional_param('type', '', PARAM_ALPHA);
+    $type        = optional_param('type', '', PARAM_ALPHANUMEXT);
     $returntomod = optional_param('return', 0, PARAM_BOOL);
 
     redirect("$CFG->wwwroot/course/modedit.php?add=$add&type=$type&course=$id&section=$section&return=$returntomod");
diff --git a/course/modedit.php b/course/modedit.php
index b9bf127..ec10700 100644
--- a/course/modedit.php
+++ b/course/modedit.php
@@ -34,7 +34,7 @@
 $add    = optional_param('add', '', PARAM_ALPHA);     // module name
 $update = optional_param('update', 0, PARAM_INT);
 $return = optional_param('return', 0, PARAM_BOOL);    //return to course/view.php if false or mod/modname/view.php if true
-$type   = optional_param('type', '', PARAM_ALPHANUM); //TODO: hopefully will be removed in 2.0
+$type   = optional_param('type', '', PARAM_ALPHANUMEXT); //TODO: hopefully will be removed in 2.0
 
 $url = new moodle_url('/course/modedit.php');
 if (!empty($return)) {