diff --git a/classes/controller.php b/classes/controller.php
index e73d6c2b..312ad8e7 100644
--- a/classes/controller.php
+++ b/classes/controller.php
@@ -1185,6 +1185,9 @@ class AdminController
             $route = !isset($data['route']) ? dirname($this->admin->route) : $data['route'];
             $obj = $this->admin->page(true);
 
+            // Ensure route is prefixed with a forward slash.
+            $route = '/' . ltrim($route, '/');
+
             if (isset($data['frontmatter']) && !$this->checkValidFrontmatter($data['frontmatter'])) {
                 $this->admin->setMessage($this->admin->translate('PLUGIN_ADMIN.INVALID_FRONTMATTER_COULD_NOT_SAVE'), 'error');
                 return false;