diff --git a/libuavcan/include/uavcan/node/generic_subscriber.hpp b/libuavcan/include/uavcan/node/generic_subscriber.hpp
index 33b57a893f..9ba10162a6 100644
--- a/libuavcan/include/uavcan/node/generic_subscriber.hpp
+++ b/libuavcan/include/uavcan/node/generic_subscriber.hpp
@@ -53,6 +53,7 @@ public:
     TransferType getTransferType()   const { return safeget<TransferType, &IncomingTransfer::getTransferType>(); }
     TransferID getTransferID()       const { return safeget<TransferID, &IncomingTransfer::getTransferID>(); }
     NodeID getSrcNodeID()            const { return safeget<NodeID, &IncomingTransfer::getSrcNodeID>(); }
+    uint8_t getIfaceIndex()          const { return safeget<uint8_t, &IncomingTransfer::getIfaceIndex>(); }
 };
 
 template <typename Stream, typename DataType>
diff --git a/libuavcan/include/uavcan/transport/transfer_listener.hpp b/libuavcan/include/uavcan/transport/transfer_listener.hpp
index be1e8ad41b..1b241d3a23 100644
--- a/libuavcan/include/uavcan/transport/transfer_listener.hpp
+++ b/libuavcan/include/uavcan/transport/transfer_listener.hpp
@@ -26,18 +26,20 @@ class IncomingTransfer : public ITransferBuffer
     TransferType transfer_type_;
     TransferID transfer_id_;
     NodeID src_node_id_;
+    uint8_t iface_index_;
 
     /// That's a no-op, asserts in debug builds
     int write(unsigned int offset, const uint8_t* data, unsigned int len);
 
 protected:
     IncomingTransfer(MonotonicTime ts_mono, UtcTime ts_utc, TransferType transfer_type,
-                     TransferID transfer_id, NodeID source_node_id)
+                     TransferID transfer_id, NodeID source_node_id, uint8_t iface_index)
     : ts_mono_(ts_mono)
     , ts_utc_(ts_utc)
     , transfer_type_(transfer_type)
     , transfer_id_(transfer_id)
     , src_node_id_(source_node_id)
+    , iface_index_(iface_index)
     { }
 
 public:
@@ -51,6 +53,7 @@ public:
     TransferType getTransferType()        const { return transfer_type_; }
     TransferID getTransferID()            const { return transfer_id_; }
     NodeID getSrcNodeID()                 const { return src_node_id_; }
+    uint8_t getIfaceIndex()               const { return iface_index_; }
 };
 
 /**
diff --git a/libuavcan/src/transport/transfer_listener.cpp b/libuavcan/src/transport/transfer_listener.cpp
index 0da3b4a6e2..411f174310 100644
--- a/libuavcan/src/transport/transfer_listener.cpp
+++ b/libuavcan/src/transport/transfer_listener.cpp
@@ -23,7 +23,7 @@ int IncomingTransfer::write(unsigned int, const uint8_t*, unsigned int)
  */
 SingleFrameIncomingTransfer::SingleFrameIncomingTransfer(const RxFrame& frm)
 : IncomingTransfer(frm.getMonotonicTimestamp(), frm.getUtcTimestamp(), frm.getTransferType(),
-                   frm.getTransferID(), frm.getSrcNodeID())
+                   frm.getTransferID(), frm.getSrcNodeID(), frm.getIfaceIndex())
 , payload_(frm.getPayloadPtr())
 , payload_len_(frm.getPayloadLen())
 {
@@ -52,7 +52,7 @@ int SingleFrameIncomingTransfer::read(unsigned int offset, uint8_t* data, unsign
 MultiFrameIncomingTransfer::MultiFrameIncomingTransfer(MonotonicTime ts_mono, UtcTime ts_utc,
                                                        const RxFrame& last_frame, TransferBufferAccessor& tba)
 : IncomingTransfer(ts_mono, ts_utc, last_frame.getTransferType(), last_frame.getTransferID(),
-                   last_frame.getSrcNodeID())
+                   last_frame.getSrcNodeID(), last_frame.getIfaceIndex())
 , buf_acc_(tba)
 {
     assert(last_frame.isValid());
diff --git a/libuavcan/test/node/subscriber.cpp b/libuavcan/test/node/subscriber.cpp
index 1b215852f5..980c70a7a2 100644
--- a/libuavcan/test/node/subscriber.cpp
+++ b/libuavcan/test/node/subscriber.cpp
@@ -24,6 +24,7 @@ struct SubscriptionListener
         uavcan::TransferType transfer_type;
         uavcan::TransferID transfer_id;
         uavcan::NodeID src_node_id;
+        uavcan::uint8_t iface_index;
         DataType msg;
 
         ReceivedDataStructureCopy(const ReceivedDataStructure& s)
@@ -32,6 +33,7 @@ struct SubscriptionListener
         , transfer_type(s.getTransferType())
         , transfer_id(s.getTransferID())
         , src_node_id(s.getSrcNodeID())
+        , iface_index(s.getIfaceIndex())
         , msg(s)
         { }
     };
@@ -155,6 +157,7 @@ TEST(Subscriber, Basic)
         ASSERT_EQ(rx_frames[i].getTransferID(), s.transfer_id);
         ASSERT_EQ(rx_frames[i].getTransferType(), s.transfer_type);
         ASSERT_EQ(rx_frames[i].getMonotonicTimestamp(), s.ts_monotonic);
+        ASSERT_EQ(rx_frames[i].getIfaceIndex(), s.iface_index);
     }
 
     ASSERT_EQ(listener.simple.size(), rx_frames.size());