diff --git a/workflow/engine/methods/setup/pluginsChange.php b/workflow/engine/methods/setup/pluginsChange.php
index 9d5453157..a9b6c472c 100644
--- a/workflow/engine/methods/setup/pluginsChange.php
+++ b/workflow/engine/methods/setup/pluginsChange.php
@@ -93,8 +93,8 @@ if ($handle = opendir( PATH_PLUGINS )) {
      * Calls PMExtensionClass Builder to include Plugins changes.
      */
     $config = Bootstrap::getSystemConfiguration();
-
-    if (!empty($config['experimental_features'])) {
+    $activeExperimentalFeatures = isset($config['experimental_features']) ? $config['experimental_features'] : true;
+    if ($activeExperimentalFeatures) {
         $phpBuilder = new ProcessMakerPhpBuilderHelper();
         $phpBuilder->enabledExtensions = $oPluginRegistry->getEnabledPlugins();
         if (!empty($phpBuilder->enabledExtensions)) {