diff --git a/include/functions.php b/include/functions.php
index 37efefbca..deddf358f 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -1000,6 +1000,7 @@
 
 	function sanity_check() {
 		require_once 'errors.php';
+		global $ERRORS;
 
 		$error_code = 0;
 		$schema_version = get_schema_version(true);