diff --git a/fullnode/src/main.rs b/fullnode/src/main.rs
index 2b3d6a1595..f589e42493 100644
--- a/fullnode/src/main.rs
+++ b/fullnode/src/main.rs
@@ -191,6 +191,7 @@ fn main() {
             Arg::with_name("no_signer")
                 .long("no-signer")
                 .takes_value(false)
+                .conflicts_with("signer")
                 .help("Launch node without vote signer"),
         )
         .get_matches();