diff --git a/mod/scorm/datamodels/scorm_12.js.php b/mod/scorm/datamodels/scorm_12.js.php
index 3851062457b..6e5ceb0cdfb 100644
--- a/mod/scorm/datamodels/scorm_12.js.php
+++ b/mod/scorm/datamodels/scorm_12.js.php
@@ -133,8 +133,8 @@ function SCORMapi1_2() {
     $objectives = '';
     foreach($userdata as $element => $value){
         if (substr($element,0,14) == 'cmi.objectives') {
-            preg_match('/\.(\d+)\./',$element,$matches);
-            $element = preg_replace('/\.(\d+)\./',".\$1.",$element);
+            $element = preg_replace('/\.(\d+)\./', "_\$1.", $element);
+            preg_match('/_(\d+)\./', $element, $matches);
             if (isset($matches[1]) && $matches[1] == $count) {
                 $count++;
                 $end = strpos($element,$matches[1])+strlen($matches[1]);