diff --git a/src/bin/proxmox-backup-client.rs b/src/bin/proxmox-backup-client.rs
index 54e11f08..70aba77f 100644
--- a/src/bin/proxmox-backup-client.rs
+++ b/src/bin/proxmox-backup-client.rs
@@ -875,6 +875,11 @@ fn keyfile_parameters(param: &Value) -> Result<(Option<Vec<u8>>, CryptMode), Err
                    description: "Path to file.",
                }
            },
+           "all-file-systems": {
+               type: Boolean,
+               description: "Include all mounted subdirectories.",
+               optional: true,
+           },
            keyfile: {
                schema: KEYFILE_SCHEMA,
                optional: true,