diff --git a/get-involved.php b/get-involved.php
index fc9eec0731..6bbe168bdf 100644
--- a/get-involved.php
+++ b/get-involved.php
@@ -54,6 +54,8 @@
 
 <h3 class="content-title" id="references">Useful links for developers</h3>
 <ul class="content-box listed">
+    <li><a href="https://heap.space">lxr</a> - an online interface to the
+       PHP source, providing search facilities useful for programmers and researchers</li>
     <li><a href="https://wiki.php.net/rfc/howto">The RFC process</a> - the process
         by which developers can suggest and discuss new ideas with the community</li>
     <li><a href="/build-setup.php">Developer Setup Help</a> - some helpful information
@@ -63,13 +65,6 @@
 </ul>
 
 <?php
-/*
-XXX: lxr is offline and should be re-added once its are back online in a more permanent state (Kalle, 17/10/2017)
-
-     <li><a href="http://lxr.php.net">lxr</a> - an online interface to the
-       PHP source, providing search facilities useful for programmers and researchers</li>
-
-*/
 
 $SIDEBAR_DATA ='
 <div class="panel">
diff --git a/sites.php b/sites.php
index bda9964901..b582fb0860 100644
--- a/sites.php
+++ b/sites.php
@@ -155,7 +155,7 @@ interface to it. There you can browse the history (and latest versions) of the
  Checking out the source code can be done <a href="git.php">anonymously</a>.
 </p>
 <p>
- Using <a href="http://lxr.php.net/">OpenGrok</a> is another option to view the
+ Using <a href="https://heap.space/">OpenGrok</a> is another option to view the
  source code, and it offers additional features like search and cross referencing.
 </p>
 </div>