diff --git a/apache/manual_save.cgi b/apache/manual_save.cgi
index 89450cf1c..42a73dc3d 100755
--- a/apache/manual_save.cgi
+++ b/apache/manual_save.cgi
@@ -69,7 +69,8 @@ if ($config{'test_manual'}) {
 	$err = &test_config();
 	if ($err) {
 		&copy_source_dest($temp, $file);
-		&error(&text('manual_etest', "<pre>$err</pre>"));
+		&error(&text('manual_etest',
+			     "<pre>".&html_escape($err)."</pre>"));
 		}
 	}
 unlink($temp);