diff --git a/Firmata.cpp b/Firmata.cpp
index 6134ebfa..755048a9 100644
--- a/Firmata.cpp
+++ b/Firmata.cpp
@@ -95,7 +95,7 @@ FirmataClass::FirmataClass()
   parser.attach(STRING_DATA, (FirmataParser::stringCallbackFunction)staticStringCallback, (void *)NULL);
   parser.attach(START_SYSEX, (FirmataParser::sysexCallbackFunction)staticSysexCallback, (void *)NULL);
   parser.attach(REPORT_FIRMWARE, (FirmataParser::versionCallbackFunction)staticReportFirmwareCallback, this);
-  parser.attach(REPORT_VERSION, (FirmataParser::systemCallbackFunction)staticReportVersionCallback, this);
+  parser.attach(REPORT_VERSION, (FirmataParser::versionCallbackFunction)staticReportVersionCallback, this);
   parser.attach(SYSTEM_RESET, (FirmataParser::systemCallbackFunction)staticSystemResetCallback, (void *)NULL);
 }
 
diff --git a/Firmata.h b/Firmata.h
index cda11a6e..1ba67926 100644
--- a/Firmata.h
+++ b/Firmata.h
@@ -151,7 +151,7 @@ class FirmataClass
     inline static void staticStringCallback (void *, const char * c_str) { if ( currentStringCallback ) { currentStringCallback((char *)c_str); } }
     inline static void staticSysexCallback (void *, uint8_t command, size_t argc, uint8_t *argv) { if ( currentSysexCallback ) { currentSysexCallback(command, (uint8_t)argc, argv); } }
     inline static void staticReportFirmwareCallback (void * context, size_t, size_t, const char *) { if ( context ) { ((FirmataClass *)context)->printFirmwareVersion(); } }
-    inline static void staticReportVersionCallback (void * context) { if ( context ) { ((FirmataClass *)context)->printVersion(); } }
+    inline static void staticReportVersionCallback (void * context, size_t, size_t, const char *) { if ( context ) { ((FirmataClass *)context)->printVersion(); } }
     inline static void staticSystemResetCallback (void *) { if ( currentSystemResetCallback ) { currentSystemResetCallback(); } }
 };
 
diff --git a/FirmataMarshaller.cpp b/FirmataMarshaller.cpp
index 2b1f45a9..3e5a84d7 100644
--- a/FirmataMarshaller.cpp
+++ b/FirmataMarshaller.cpp
@@ -179,6 +179,8 @@ const
 {
   if ( (Stream *)NULL == FirmataStream ) { return; }
   FirmataStream->write(REPORT_VERSION);
+  FirmataStream->write(PROTOCOL_MAJOR_VERSION);
+  FirmataStream->write(PROTOCOL_MINOR_VERSION);
 }
 
 /**
diff --git a/FirmataParser.cpp b/FirmataParser.cpp
index 415e6e07..1198ab04 100644
--- a/FirmataParser.cpp
+++ b/FirmataParser.cpp
@@ -61,7 +61,7 @@ FirmataParser::FirmataParser(uint8_t * const dataBuffer, size_t dataBufferSize)
   currentStringCallback((stringCallbackFunction)NULL),
   currentSysexCallback((sysexCallbackFunction)NULL),
   currentReportFirmwareCallback((versionCallbackFunction)NULL),
-  currentReportVersionCallback((systemCallbackFunction)NULL),
+  currentReportVersionCallback((versionCallbackFunction)NULL),
   currentSystemResetCallback((systemCallbackFunction)NULL)
 {
     allowBufferUpdate = ((uint8_t *)NULL == dataBuffer);
@@ -130,6 +130,9 @@ void FirmataParser::parse(uint8_t inputData)
           if (currentReportDigitalCallback)
             (*currentReportDigitalCallback)(currentReportDigitalCallbackContext, multiByteChannel, dataBuffer[0]);
           break;
+        case REPORT_VERSION:
+          if (currentReportVersionCallback)
+            (*currentReportVersionCallback)(currentReportVersionCallbackContext, dataBuffer[0], dataBuffer[1], (const char *)NULL);
       }
       executeMultiByteCommand = 0;
     }
@@ -163,8 +166,8 @@ void FirmataParser::parse(uint8_t inputData)
         systemReset();
         break;
       case REPORT_VERSION:
-        if (currentReportVersionCallback)
-          (*currentReportVersionCallback)(currentReportVersionCallbackContext);
+        waitForData = 2; // two data bytes needed
+        executeMultiByteCommand = command;
         break;
     }
   }
@@ -244,12 +247,13 @@ void FirmataParser::attach(uint8_t command, callbackFunction newFunction, void *
 }
 
 /**
- * Attach a version callback function (supported option: REPORT_FIRMWARE).
+ * Attach a version callback function (supported options are: REPORT_FIRMWARE, REPORT_VERSION).
  * @param command The ID of the command to attach a callback function to.
  * @param newFunction A reference to the callback function to attach.
  * @param context An optional context to be provided to the callback function (NULL by default).
  * @note The context parameter is provided so you can pass a parameter, by reference, to
  *       your callback function.
+ * @note The description value in the REPORT_VERSION callback will always be NULL
  */
 void FirmataParser::attach(uint8_t command, versionCallbackFunction newFunction, void * context)
 {
@@ -258,11 +262,15 @@ void FirmataParser::attach(uint8_t command, versionCallbackFunction newFunction,
       currentReportFirmwareCallback = newFunction;
       currentReportFirmwareCallbackContext = context;
       break;
+    case REPORT_VERSION:
+      currentReportVersionCallback = newFunction;
+      currentReportVersionCallbackContext = context;
+      break;
   }
 }
 
 /**
- * Attach a system callback function (supported options are: SYSTEM_RESET, REPORT_VERSION).
+ * Attach a system callback function (supported option: SYSTEM_RESET).
  * @param command The ID of the command to attach a callback function to.
  * @param newFunction A reference to the callback function to attach.
  * @param context An optional context to be provided to the callback function (NULL by default).
@@ -272,10 +280,6 @@ void FirmataParser::attach(uint8_t command, versionCallbackFunction newFunction,
 void FirmataParser::attach(uint8_t command, systemCallbackFunction newFunction, void * context)
 {
   switch (command) {
-    case REPORT_VERSION:
-      currentReportVersionCallback = newFunction;
-      currentReportVersionCallbackContext = context;
-      break;
     case SYSTEM_RESET:
       currentSystemResetCallback = newFunction;
       currentSystemResetCallbackContext = context;
@@ -341,6 +345,8 @@ void FirmataParser::detach(uint8_t command)
       attach(command, (versionCallbackFunction)NULL, NULL);
       break;
     case REPORT_VERSION:
+      attach(command, (versionCallbackFunction)NULL, NULL);
+      break;
     case SYSTEM_RESET:
       attach(command, (systemCallbackFunction)NULL, NULL);
       break;
diff --git a/FirmataParser.h b/FirmataParser.h
index 1790b521..a7f210c7 100644
--- a/FirmataParser.h
+++ b/FirmataParser.h
@@ -90,7 +90,7 @@ class FirmataParser
     stringCallbackFunction currentStringCallback;
     sysexCallbackFunction currentSysexCallback;
     versionCallbackFunction currentReportFirmwareCallback;
-    systemCallbackFunction currentReportVersionCallback;
+    versionCallbackFunction currentReportVersionCallback;
     systemCallbackFunction currentSystemResetCallback;
 
     /* private methods ------------------------------ */