diff --git a/dsdl/uavcan/protocol/553.GetTransportStats.uavcan b/dsdl/uavcan/protocol/553.GetTransportStats.uavcan
index 5afe15930c..51902d05e7 100644
--- a/dsdl/uavcan/protocol/553.GetTransportStats.uavcan
+++ b/dsdl/uavcan/protocol/553.GetTransportStats.uavcan
@@ -5,9 +5,9 @@
 ---
 
 # UAVCAN transport layer statistics
-uint64 transfers_tx
-uint64 transfers_rx
-uint64 transfer_errors
+uint48 transfers_tx
+uint48 transfers_rx
+uint48 transfer_errors
 
 # CAN bus statistics, for each interface independently
 CANIfaceStats[<=3] can_iface_stats
diff --git a/dsdl/uavcan/protocol/CANIfaceStats.uavcan b/dsdl/uavcan/protocol/CANIfaceStats.uavcan
index 23089db283..ed5fe4981b 100644
--- a/dsdl/uavcan/protocol/CANIfaceStats.uavcan
+++ b/dsdl/uavcan/protocol/CANIfaceStats.uavcan
@@ -2,6 +2,6 @@
 # Single CAN iface statistics
 #
 
-uint64 frames_tx
-uint64 frames_rx
-uint64 errors
+uint48 frames_tx
+uint48 frames_rx
+uint48 errors
diff --git a/libuavcan/test/protocol/transport_stats_provider.cpp b/libuavcan/test/protocol/transport_stats_provider.cpp
index ded5af54ad..e309977d2f 100644
--- a/libuavcan/test/protocol/transport_stats_provider.cpp
+++ b/libuavcan/test/protocol/transport_stats_provider.cpp
@@ -49,7 +49,7 @@ TEST(TransportStatsProvider, Basic)
     ASSERT_EQ(1, tsp_cln.collector.result->response.can_iface_stats.size());
     ASSERT_EQ(0, tsp_cln.collector.result->response.can_iface_stats[0].errors);
     ASSERT_EQ(2, tsp_cln.collector.result->response.can_iface_stats[0].frames_rx);
-    ASSERT_EQ(8, tsp_cln.collector.result->response.can_iface_stats[0].frames_tx);
+    ASSERT_EQ(6, tsp_cln.collector.result->response.can_iface_stats[0].frames_tx);
 
     /*
      * Sending a malformed frame, it must be registered as tranfer error
@@ -80,5 +80,5 @@ TEST(TransportStatsProvider, Basic)
     ASSERT_EQ(1, tsp_cln.collector.result->response.can_iface_stats.size());
     ASSERT_EQ(72, tsp_cln.collector.result->response.can_iface_stats[0].errors);
     ASSERT_EQ(4, tsp_cln.collector.result->response.can_iface_stats[0].frames_rx);     // Same here
-    ASSERT_EQ(16, tsp_cln.collector.result->response.can_iface_stats[0].frames_tx);
+    ASSERT_EQ(12, tsp_cln.collector.result->response.can_iface_stats[0].frames_tx);
 }