diff --git a/examples/multisig_plain/lib.rs b/examples/multisig_plain/lib.rs
index 590f2685ef..e5ca81466f 100755
--- a/examples/multisig_plain/lib.rs
+++ b/examples/multisig_plain/lib.rs
@@ -486,7 +486,7 @@ mod multisig_plain {
         ///
         /// Its return value indicates whether the called transaction was successful.
         /// This can be called by anyone.
-        #[ink(message)]
+        #[ink(message, payable)]
         pub fn invoke_transaction(
             &mut self,
             trans_id: TransactionId,