diff --git a/meson_options.txt b/meson_options.txt
index 18190e3..d29c2f9 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -26,3 +26,9 @@
     value: 'trust_bundle',
     description: 'File name of the authorities list',
 )
+
+option('allow-expired',
+    type: 'feature',
+    value: 'enabled',
+    description: 'Allow expired certificates',
+)