diff --git a/proxmox-notify/Cargo.toml b/proxmox-notify/Cargo.toml
index 52a466e2..3e8d253e 100644
--- a/proxmox-notify/Cargo.toml
+++ b/proxmox-notify/Cargo.toml
@@ -31,7 +31,7 @@ proxmox-time.workspace = true
 
 [features]
 default = ["sendmail", "gotify", "smtp"]
-mail-forwarder = ["dep:mail-parser"]
+mail-forwarder = ["dep:mail-parser", "dep:proxmox-sys"]
 sendmail = ["dep:proxmox-sys"]
 gotify = ["dep:proxmox-http"]
 pve-context = ["dep:proxmox-sys"]