diff --git a/classes/module/ModuleHandler.class.php b/classes/module/ModuleHandler.class.php
index 3ad638dd2..6dc530fd0 100644
--- a/classes/module/ModuleHandler.class.php
+++ b/classes/module/ModuleHandler.class.php
@@ -264,7 +264,10 @@ class ModuleHandler extends Handler
 
 			// Add layout header script.
 			$part_config = ModuleModel::getModulePartConfig('layout', $layoutSrl);
-			Context::addHtmlHeader($part_config->header_script);
+			if ($part_config && isset($part_config->header_script))
+			{
+				Context::addHtmlHeader($part_config->header_script);
+			}
 		}
 		else
 		{