diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index a3843874b4423..ffd0dd90618c8 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -81,7 +81,7 @@ function stripslashes_deep($value)
 function test_sql_and_script_inject($val, $type)
 {
     // phpcs:enable
-    return $this->testSqlAndScriptInject($val, $type);
+    return testSqlAndScriptInject($val, $type);
 }
 
 /**