diff --git a/hardware/arduino/avr/libraries/Bridge/YunServer.cpp b/hardware/arduino/avr/libraries/Bridge/YunServer.cpp
index f23566a2f..3473ce8d9 100644
--- a/hardware/arduino/avr/libraries/Bridge/YunServer.cpp
+++ b/hardware/arduino/avr/libraries/Bridge/YunServer.cpp
@@ -46,3 +46,9 @@ YunClient YunServer::accept() {
   return YunClient(res[0]);
 }
 
+size_t YunServer::write(uint8_t c) {
+  uint8_t cmd[] = { 'b', c };
+  bridge.transfer(cmd, 2);
+  return 1;
+}
+
diff --git a/hardware/arduino/avr/libraries/Bridge/YunServer.h b/hardware/arduino/avr/libraries/Bridge/YunServer.h
index 734392414..69fdeabbc 100644
--- a/hardware/arduino/avr/libraries/Bridge/YunServer.h
+++ b/hardware/arduino/avr/libraries/Bridge/YunServer.h
@@ -32,7 +32,7 @@ public:
   void begin();
   YunClient accept();
 
-  virtual size_t write(uint8_t c) { /* TODO */ }
+  virtual size_t write(uint8_t c);
 
   void listenOnLocalhost()   { useLocalhost = true; }
   void noListenOnLocalhost() { useLocalhost = false; }