diff --git a/pw_bluetooth_proxy/basic_l2cap_channel.cc b/pw_bluetooth_proxy/basic_l2cap_channel.cc
index a5c00be50..842969e84 100644
--- a/pw_bluetooth_proxy/basic_l2cap_channel.cc
+++ b/pw_bluetooth_proxy/basic_l2cap_channel.cc
@@ -25,6 +25,7 @@ namespace pw::bluetooth::proxy {
 pw::Result<BasicL2capChannel> BasicL2capChannel::Create(
     L2capChannelManager& l2cap_channel_manager,
     uint16_t connection_handle,
+    AclTransportType transport,
     uint16_t local_cid,
     uint16_t remote_cid,
     Function<void(pw::span<uint8_t> payload)>&& payload_from_controller_fn,
@@ -38,6 +39,7 @@ pw::Result<BasicL2capChannel> BasicL2capChannel::Create(
   return BasicL2capChannel(
       /*l2cap_channel_manager=*/l2cap_channel_manager,
       /*connection_handle=*/connection_handle,
+      /*transport=*/transport,
       /*local_cid=*/local_cid,
       /*remote_cid=*/remote_cid,
       /*payload_from_controller_fn=*/std::move(payload_from_controller_fn),
@@ -73,13 +75,14 @@ pw::Status BasicL2capChannel::Write(pw::span<const uint8_t> payload) {
 BasicL2capChannel::BasicL2capChannel(
     L2capChannelManager& l2cap_channel_manager,
     uint16_t connection_handle,
+    AclTransportType transport,
     uint16_t local_cid,
     uint16_t remote_cid,
     Function<void(pw::span<uint8_t> payload)>&& payload_from_controller_fn,
     Function<void()>&& queue_space_available_fn)
     : L2capChannel(/*l2cap_channel_manager=*/l2cap_channel_manager,
                    /*connection_handle=*/connection_handle,
-                   /*transport=*/AclTransportType::kLe,
+                   /*transport=*/transport,
                    /*local_cid=*/local_cid,
                    /*remote_cid=*/remote_cid,
                    /*payload_from_controller_fn=*/
diff --git a/pw_bluetooth_proxy/l2cap_aclu_signaling_channel.cc b/pw_bluetooth_proxy/l2cap_aclu_signaling_channel.cc
index b52e4ef6c..39be27a9f 100644
--- a/pw_bluetooth_proxy/l2cap_aclu_signaling_channel.cc
+++ b/pw_bluetooth_proxy/l2cap_aclu_signaling_channel.cc
@@ -26,6 +26,7 @@ L2capAclUSignalingChannel::L2capAclUSignalingChannel(
     : L2capSignalingChannel(
           /*l2cap_channel_manager=*/l2cap_channel_manager,
           /*connection_handle=*/connection_handle,
+          /*transport=*/AclTransportType::kBrEdr,
           /*fixed_cid=*/
           cpp23::to_underlying(emboss::L2capFixedCid::ACL_U_SIGNALING)) {}
 
diff --git a/pw_bluetooth_proxy/l2cap_leu_signaling_channel.cc b/pw_bluetooth_proxy/l2cap_leu_signaling_channel.cc
index a6ed5f4dd..35c931ebe 100644
--- a/pw_bluetooth_proxy/l2cap_leu_signaling_channel.cc
+++ b/pw_bluetooth_proxy/l2cap_leu_signaling_channel.cc
@@ -24,6 +24,7 @@ L2capLeUSignalingChannel::L2capLeUSignalingChannel(
     : L2capSignalingChannel(
           /*l2cap_channel_manager=*/l2cap_channel_manager,
           /*connection_handle=*/connection_handle,
+          /*transport=*/AclTransportType::kLe,
           /*fixed_cid=*/
           cpp23::to_underlying(emboss::L2capFixedCid::LE_U_SIGNALING)) {}
 
diff --git a/pw_bluetooth_proxy/l2cap_signaling_channel.cc b/pw_bluetooth_proxy/l2cap_signaling_channel.cc
index 45765aec6..fd7a8546b 100644
--- a/pw_bluetooth_proxy/l2cap_signaling_channel.cc
+++ b/pw_bluetooth_proxy/l2cap_signaling_channel.cc
@@ -31,9 +31,11 @@ namespace pw::bluetooth::proxy {
 L2capSignalingChannel::L2capSignalingChannel(
     L2capChannelManager& l2cap_channel_manager,
     uint16_t connection_handle,
+    AclTransportType transport,
     uint16_t fixed_cid)
     : BasicL2capChannel(/*l2cap_channel_manager=*/l2cap_channel_manager,
                         /*connection_handle=*/connection_handle,
+                        /*transport*/ transport,
                         /*local_cid=*/fixed_cid,
                         /*remote_cid=*/fixed_cid,
                         /*payload_from_controller_fn=*/nullptr,
diff --git a/pw_bluetooth_proxy/proxy_host.cc b/pw_bluetooth_proxy/proxy_host.cc
index f6670a46e..ce5c03e92 100644
--- a/pw_bluetooth_proxy/proxy_host.cc
+++ b/pw_bluetooth_proxy/proxy_host.cc
@@ -444,6 +444,7 @@ pw::Result<BasicL2capChannel> ProxyHost::AcquireBasicL2capChannel(
   return BasicL2capChannel::Create(
       /*l2cap_channel_manager=*/l2cap_channel_manager_,
       /*connection_handle=*/connection_handle,
+      /*transport=*/transport,
       /*local_cid=*/local_cid,
       /*remote_cid=*/remote_cid,
       /*payload_from_controller_fn=*/std::move(payload_from_controller_fn),
diff --git a/pw_bluetooth_proxy/public/pw_bluetooth_proxy/basic_l2cap_channel.h b/pw_bluetooth_proxy/public/pw_bluetooth_proxy/basic_l2cap_channel.h
index b9438a8b2..e054518cd 100644
--- a/pw_bluetooth_proxy/public/pw_bluetooth_proxy/basic_l2cap_channel.h
+++ b/pw_bluetooth_proxy/public/pw_bluetooth_proxy/basic_l2cap_channel.h
@@ -25,6 +25,7 @@ class BasicL2capChannel : public L2capChannel {
   static pw::Result<BasicL2capChannel> Create(
       L2capChannelManager& l2cap_channel_manager,
       uint16_t connection_handle,
+      AclTransportType transport,
       uint16_t local_cid,
       uint16_t remote_cid,
       Function<void(pw::span<uint8_t> payload)>&& payload_from_controller_fn,
@@ -57,6 +58,7 @@ class BasicL2capChannel : public L2capChannel {
   explicit BasicL2capChannel(
       L2capChannelManager& l2cap_channel_manager,
       uint16_t connection_handle,
+      AclTransportType transport,
       uint16_t local_cid,
       uint16_t remote_cid,
       Function<void(pw::span<uint8_t> payload)>&& payload_from_controller_fn,
diff --git a/pw_bluetooth_proxy/public/pw_bluetooth_proxy/internal/l2cap_signaling_channel.h b/pw_bluetooth_proxy/public/pw_bluetooth_proxy/internal/l2cap_signaling_channel.h
index 6c2f88c75..cc3f1046a 100644
--- a/pw_bluetooth_proxy/public/pw_bluetooth_proxy/internal/l2cap_signaling_channel.h
+++ b/pw_bluetooth_proxy/public/pw_bluetooth_proxy/internal/l2cap_signaling_channel.h
@@ -30,6 +30,7 @@ class L2capSignalingChannel : public BasicL2capChannel {
  public:
   explicit L2capSignalingChannel(L2capChannelManager& l2cap_channel_manager,
                                  uint16_t connection_handle,
+                                 AclTransportType transport,
                                  uint16_t fixed_cid);
 
   L2capSignalingChannel& operator=(L2capSignalingChannel&& other);