diff --git a/vpl_example_CE.class.php b/vpl_example_CE.class.php
index d8328f5c..e101d035 100644
--- a/vpl_example_CE.class.php
+++ b/vpl_example_CE.class.php
@@ -48,17 +48,17 @@ public function __construct($vpl) {
      * Cache file group used as submitted files.
      * @var object
      */
-    protected $submitted_fgm;
+    protected $submittedfgm;
 
     /**
      *
      * @return object file group manager for example files
      */
     public function get_submitted_fgm() {
-        if (! isset($this->submitted_fgm)) {
-            $this->submitted_fgm = $this->vpl->get_required_fgm();
+        if (! isset($this->submittedfgm)) {
+            $this->submittedfgm = $this->vpl->get_required_fgm();
         }
-        return $this->submitted_fgm;
+        return $this->submittedfgm;
     }
 
     /**