diff --git a/src/lib.rs b/src/lib.rs
index 108fe12..2913f45 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -721,6 +721,9 @@ pub enum OfflineWalletSubCommand {
         /// Selects which policy should be used to satisfy the internal descriptor
         #[structopt(name = "INT_POLICY", long = "internal_policy")]
         internal_policy: Option<String>,
+        /// Allows 80-bytes of arbitrary data to a transaction output via OP_RETURN
+        #[structopt(name = "ADD_DATA", long = "add_data")]
+        add_data: String,
     },
     /// Bumps the fees of an RBF transaction
     BumpFee {
@@ -920,6 +923,7 @@ where
             fee_rate,
             external_policy,
             internal_policy,
+            add_data,
         } => {
             let mut tx_builder = wallet.build_tx();
 
@@ -928,6 +932,9 @@ where
             } else {
                 tx_builder.set_recipients(recipients);
             }
+            if !&add_data.is_empty() {
+                tx_builder.add_data(add_data.as_bytes());
+            }
 
             if enable_rbf {
                 tx_builder.enable_rbf();