diff --git a/FAQ.md b/FAQ.md
index 7a2edb7..32fb967 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -1409,6 +1409,10 @@ https://github.com/rustdesk/rustdesk-server-pro/issues/312
 
 If you want authentication before allowing a device to register, please turn on `Settings` -> `Others` -> `Disable new devices` on web console.
 
+# AV false report about the custom clients.
+
+Could you confirm if the exe is code-signed. Sometiems, the signing may fail when you build custom client. You can try to build a new one. If it is code signed, there is really nothing we can do, it is totally out of our control. Our public download alos has this problem for some AV vendors, we have to report false positive to AV vendors one by one for every new version.
+
 # The new icon for my custom client does not take effect on Windows after I change it.
 
 ```