diff --git a/substrate/tendermint/client/src/authority/mod.rs b/substrate/tendermint/client/src/authority/mod.rs
index 1f176876..c87c8394 100644
--- a/substrate/tendermint/client/src/authority/mod.rs
+++ b/substrate/tendermint/client/src/authority/mod.rs
@@ -263,7 +263,7 @@ impl<T: TendermintValidator> Network for TendermintAuthority<T> {
     self.active.as_mut().unwrap().gossip_queue.write().unwrap().push(msg);
   }
 
-  async fn slash(&mut self, validator: u16) {
+  async fn slash(&mut self, _validator: u16) {
     todo!()
   }