diff --git a/libraries/AP_UAVCAN/AP_UAVCAN_Servers.cpp b/libraries/AP_UAVCAN/AP_UAVCAN_Servers.cpp
index 20c1ef1e05..806c341775 100644
--- a/libraries/AP_UAVCAN/AP_UAVCAN_Servers.cpp
+++ b/libraries/AP_UAVCAN/AP_UAVCAN_Servers.cpp
@@ -77,7 +77,7 @@ public:
 class AP_UAVCAN_FileEventTracer : public uavcan::dynamic_node_id_server::IEventTracer
 {
 protected:
-    virtual void onEvent(uavcan::dynamic_node_id_server::TraceCode code, uavcan::int64_t argument)
+    virtual void onEvent(uavcan::dynamic_node_id_server::TraceCode code, uavcan::int64_t argument) override
     {
         AP::logger().Write("UCEV", "TimeUS,code,arg", "s--", "F--", "Qhq", AP_HAL::micros64(), code, argument);
     }
@@ -129,7 +129,7 @@ class AP_UAVCAN_FileStorageBackend : public uavcan::dynamic_node_id_server::ISto
 
     static uint8_t num_opens;
 protected:
-    virtual String get(const String& key) const
+    virtual String get(const String& key) const override
     {
         using namespace std;
         PathString path = base_path.c_str();
@@ -176,7 +176,7 @@ protected:
         return value;
     }
 
-    virtual void set(const String& key, const String& value)
+    virtual void set(const String& key, const String& value) override
     {
         using namespace std;
         PathString path = base_path.c_str();
diff --git a/libraries/AP_UAVCAN/examples/UAVCAN_sniffer/UAVCAN_sniffer.cpp b/libraries/AP_UAVCAN/examples/UAVCAN_sniffer/UAVCAN_sniffer.cpp
index 256d8920a4..160c6d4bbc 100644
--- a/libraries/AP_UAVCAN/examples/UAVCAN_sniffer/UAVCAN_sniffer.cpp
+++ b/libraries/AP_UAVCAN/examples/UAVCAN_sniffer/UAVCAN_sniffer.cpp
@@ -68,19 +68,19 @@ private:
         }
 
         uavcan::UtcDuration utc_adjustment;
-        virtual void adjustUtc(uavcan::UtcDuration adjustment)
+        virtual void adjustUtc(uavcan::UtcDuration adjustment) override
         {
             utc_adjustment = adjustment;
         }
 
     public:
-        virtual uavcan::MonotonicTime getMonotonic() const
+        virtual uavcan::MonotonicTime getMonotonic() const override
         {
             uavcan::uint64_t usec = 0;
             usec = AP_HAL::micros64();
             return uavcan::MonotonicTime::fromUSec(usec);
         }
-        virtual uavcan::UtcTime getUtc() const
+        virtual uavcan::UtcTime getUtc() const override
         {
             uavcan::UtcTime utc;
             uavcan::uint64_t usec = 0;