diff --git a/lib/pagelib.php b/lib/pagelib.php
index 650179e19a4..ddea0391306 100644
--- a/lib/pagelib.php
+++ b/lib/pagelib.php
@@ -1479,6 +1479,7 @@ class moodle_page {
                     if (!empty($CFG->allowcoursethemes) && !empty($this->_course->theme) && $this->devicetypeinuse == 'default') {
                         return $this->_course->theme;
                     }
+                break;
 
                 case 'category':
                     if (!empty($CFG->allowcategorythemes) && $this->devicetypeinuse == 'default') {
@@ -1489,11 +1490,13 @@ class moodle_page {
                             }
                         }
                     }
+                break;
 
                 case 'session':
                     if (!empty($SESSION->theme)) {
                         return $SESSION->theme;
                     }
+                break;
 
                 case 'user':
                     if (!empty($CFG->allowuserthemes) && !empty($USER->theme) && $this->devicetypeinuse == 'default') {
@@ -1503,6 +1506,7 @@ class moodle_page {
                             return $USER->theme;
                         }
                     }
+                break;
 
                 case 'site':
                     if ($mnetpeertheme) {