diff --git a/libuavcan/include/uavcan/debug.hpp b/libuavcan/include/uavcan/debug.hpp
index 777e65093b..82896228fc 100644
--- a/libuavcan/include/uavcan/debug.hpp
+++ b/libuavcan/include/uavcan/debug.hpp
@@ -16,11 +16,11 @@ __attribute__ ((format(printf, 2, 3)))
 static void UAVCAN_TRACE(const char* src, const char* fmt, ...)
 {
     va_list args;
-    std::printf("UAVCAN: %s: ", src);
+    (void)std::printf("UAVCAN: %s: ", src);
     va_start(args, fmt);
-    std::vprintf(fmt, args);
+    (void)std::vprintf(fmt, args);
     va_end(args);
-    std::puts("");
+    (void)std::puts("");
 }
 
 #else
diff --git a/libuavcan/src/transport/can_io.cpp b/libuavcan/src/transport/can_io.cpp
index d89777fd96..20fe36bf66 100644
--- a/libuavcan/src/transport/can_io.cpp
+++ b/libuavcan/src/transport/can_io.cpp
@@ -159,7 +159,6 @@ void CanTxQueue::push(const CanFrame& frame, MonotonicTime tx_deadline, Qos qos,
     if (praw == NULL)
     {
         return;                                            // Seems that there is no memory at all.
-
     }
     Entry* entry = new (praw) Entry(frame, tx_deadline, qos, flags);
     assert(entry);
@@ -405,7 +404,7 @@ int CanIOManager::receive(CanRxFrame& out_frame, MonotonicTime blocking_deadline
         {
             if (masks.write & (1 << i))
             {
-                sendFromTxQueue(i);
+                (void)sendFromTxQueue(i);  // It may fail, we don't care. Requested operation was receive, not send.
             }
         }