diff --git a/src/chat.rs b/src/chat.rs
index c8c7b76ab..4d245b88d 100644
--- a/src/chat.rs
+++ b/src/chat.rs
@@ -3850,7 +3850,10 @@ pub(crate) async fn create_broadcast_ex(
 
     if sync.into() {
         let id = SyncId::Grpid(grpid);
-        let action = SyncAction::CreateBroadcast { chat_name, secret };
+        let action = SyncAction::CreateOutBroadcast {
+            chat_name,
+            shared_secret: secret,
+        };
         self::sync(context, id, action).await.log_err(context).ok();
     }
 
@@ -3873,16 +3876,17 @@ pub(crate) async fn load_broadcast_shared_secret(
 pub(crate) async fn save_broadcast_shared_secret(
     context: &Context,
     chat_id: ChatId,
-    shared_secret: &str,
+    secret: &str,
 ) -> Result<()> {
     context
         .sql
         .execute(
             "INSERT INTO broadcasts_shared_secrets (chat_id, secret) VALUES (?, ?)
                     ON CONFLICT(chat_id) DO UPDATE SET secret=excluded.chat_id",
-            (chat_id, shared_secret),
+            (chat_id, secret),
         )
         .await?;
+
     Ok(())
 }
 
@@ -5087,9 +5091,13 @@ pub(crate) enum SyncAction {
     SetVisibility(ChatVisibility),
     SetMuted(MuteDuration),
     /// Create broadcast channel with the given name.
-    CreateBroadcast {
+    CreateOutBroadcast {
         chat_name: String,
-        secret: String,
+        shared_secret: String,
+    },
+    CreateInBroadcast {
+        chat_name: String,
+        shared_secret: String,
     },
     Rename(String),
     /// Set chat contacts by their addresses.
@@ -5153,7 +5161,11 @@ impl Context {
                     .id
             }
             SyncId::Grpid(grpid) => {
-                if let SyncAction::CreateBroadcast { chat_name, secret } = action {
+                if let SyncAction::CreateOutBroadcast {
+                    chat_name,
+                    shared_secret: secret,
+                } = action
+                {
                     create_broadcast_ex(
                         self,
                         Nosync,
@@ -5184,7 +5196,7 @@ impl Context {
             SyncAction::Accept => chat_id.accept_ex(self, Nosync).await,
             SyncAction::SetVisibility(v) => chat_id.set_visibility_ex(self, Nosync, *v).await,
             SyncAction::SetMuted(duration) => set_muted_ex(self, Nosync, chat_id, *duration).await,
-            SyncAction::CreateBroadcast { .. } => {
+            SyncAction::CreateOutBroadcast { .. } | SyncAction::CreateInBroadcast { .. } => {
                 Err(anyhow!("sync_alter_chat({id:?}, {action:?}): Bad request."))
             }
             SyncAction::Rename(to) => rename_ex(self, Nosync, chat_id, to).await,
diff --git a/src/chat/chat_tests.rs b/src/chat/chat_tests.rs
index 25ac00fe9..aa92ef693 100644
--- a/src/chat/chat_tests.rs
+++ b/src/chat/chat_tests.rs
@@ -2277,7 +2277,8 @@ async fn test_only_minimal_data_are_forwarded() -> Result<()> {
     let group_id = create_group_chat(&bob, ProtectionStatus::Unprotected, "group2").await?;
     add_contact_to_chat(&bob, group_id, charlie_id).await?;
     let broadcast_id = create_broadcast(&bob, "Channel".to_string()).await?;
-    add_contact_to_chat(&bob, broadcast_id, charlie_id).await?;
+    let qr = get_securejoin_qr(&bob, Some(broadcast_id)).await?;
+    tcm.exec_securejoin_qr(&charlie, &bob, &qr).await;
     for chat_id in &[single_id, group_id, broadcast_id] {
         forward_msgs(&bob, &[orig_msg.id], *chat_id).await?;
         let sent_msg = bob.pop_sent_msg().await;
@@ -3060,8 +3061,9 @@ async fn test_leave_broadcast_multidevice() -> Result<()> {
 
     tcm.section("Alice creates broadcast channel with Bob.");
     let alice_chat_id = create_broadcast(alice, "foo".to_string()).await?;
-    let bob_contact = alice.add_or_lookup_contact(bob0).await.id;
-    add_contact_to_chat(alice, alice_chat_id, bob_contact).await?;
+    let qr = get_securejoin_qr(alice, Some(alice_chat_id)).await.unwrap();
+    tcm.exec_securejoin_qr(bob0, alice, &qr).await;
+    sync(bob0, bob1).await;
 
     tcm.section("Alice sends first message to broadcast.");
     let sent_msg = alice.send_text(alice_chat_id, "Hello!").await;
diff --git a/src/securejoin/bob.rs b/src/securejoin/bob.rs
index 9f18f3997..e83d404d7 100644
--- a/src/securejoin/bob.rs
+++ b/src/securejoin/bob.rs
@@ -12,7 +12,7 @@ use crate::contact::Origin;
 use crate::context::Context;
 use crate::events::EventType;
 use crate::key::self_fingerprint;
-use crate::log::info;
+use crate::log::{LogExt as _, info};
 use crate::message::{Message, Viewtype};
 use crate::mimeparser::{MimeMessage, SystemMessage};
 use crate::param::Param;
@@ -58,13 +58,26 @@ pub(super) async fn start_protocol(context: &Context, invite: QrInvite) -> Resul
     ContactId::scaleup_origin(context, &[invite.contact_id()], Origin::SecurejoinJoined).await?;
     context.emit_event(EventType::ContactsChanged(None));
 
-    if let QrInvite::Broadcast { shared_secret, .. } = &invite {
+    if let QrInvite::Broadcast {
+        shared_secret,
+        grpid,
+        broadcast_name,
+        ..
+    } = &invite
+    {
         // TODO this causes some performance penalty because joining_chat_id is used again below,
         // but maybe it's fine
         let broadcast_chat_id = joining_chat_id(context, &invite, chat_id).await?;
-        // TODO save the secret to the second device
+
         save_broadcast_shared_secret(context, broadcast_chat_id, shared_secret).await?;
 
+        let id = chat::SyncId::Grpid(grpid.to_string());
+        let action = chat::SyncAction::CreateInBroadcast {
+            chat_name: broadcast_name.to_string(),
+            shared_secret: shared_secret.to_string(),
+        };
+        chat::sync(context, id, action).await.log_err(context).ok();
+
         if verify_sender_by_fingerprint(context, invite.fingerprint(), invite.contact_id()).await? {
             info!(context, "Using fast securejoin with symmetric encryption");