diff --git a/src/lib/ebus/message.cpp b/src/lib/ebus/message.cpp
index e77e4e80..27dfa633 100644
--- a/src/lib/ebus/message.cpp
+++ b/src/lib/ebus/message.cpp
@@ -28,10 +28,10 @@
 using namespace std;
 
 Message::Message(const string clazz, const string name, const bool isSet,
-			const bool isPassive, const string comment,
-			const unsigned char srcAddress, const unsigned char dstAddress,
-			const vector<unsigned char> id, DataField* data,
-			const unsigned int pollPriority)
+		const bool isPassive, const string comment,
+		const unsigned char srcAddress, const unsigned char dstAddress,
+		const vector<unsigned char> id, DataField* data,
+		const unsigned int pollPriority)
 		: m_class(clazz), m_name(name), m_isSet(isSet),
 		  m_isPassive(isPassive), m_comment(comment),
 		  m_srcAddress(srcAddress), m_dstAddress(dstAddress),
@@ -50,6 +50,20 @@ Message::Message(const string clazz, const string name, const bool isSet,
 	m_key = key;
 }
 
+Message::Message(const bool isSet, const bool isPassive,
+		const unsigned char pb, const unsigned char sb,
+		DataField* data)
+		: m_class(), m_name(), m_isSet(isSet),
+		  m_isPassive(isPassive), m_comment(),
+		  m_srcAddress(SYN), m_dstAddress(SYN),
+		  m_data(data), m_pollPriority(0),
+		  m_lastUpdateTime(0), m_pollCount(0), m_lastPollTime(0)
+{
+	m_id.push_back(pb);
+	m_id.push_back(sb);
+	m_key = 0;
+}
+
 /**
  * @brief Helper method for getting a default if the value is empty.
  * @param value the value to check.
@@ -223,7 +237,7 @@ result_t Message::create(vector<string>::iterator& it, const vector<string>::ite
 	return RESULT_OK;
 }
 
-result_t Message::prepareMaster(const unsigned char srcAddress, SymbolString& masterData, istringstream& input, char separator)
+result_t Message::prepareMaster(const unsigned char srcAddress, SymbolString& masterData, istringstream& input, char separator, const unsigned char dstAddress)
 {
 	if (m_isPassive == true)
 		return RESULT_ERR_INVALID_ARG; // prepare not possible
@@ -232,7 +246,10 @@ result_t Message::prepareMaster(const unsigned char srcAddress, SymbolString& ma
 	result_t result = master.push_back(srcAddress, false, false);
 	if (result != RESULT_OK)
 		return result;
-	result = master.push_back(m_dstAddress, false, false);
+	if (dstAddress == SYN)
+		result = master.push_back(m_dstAddress, false, false);
+	else
+		result = master.push_back(dstAddress, false, false);
 	if (result != RESULT_OK)
 		return result;
 	result = master.push_back(m_id[0], false, false);
diff --git a/src/lib/ebus/message.h b/src/lib/ebus/message.h
index ff09f93e..9dea47d9 100644
--- a/src/lib/ebus/message.h
+++ b/src/lib/ebus/message.h
@@ -58,6 +58,18 @@ public:
 			const unsigned char srcAddress, const unsigned char dstAddress,
 			const vector<unsigned char> id, DataField* data,
 			const unsigned int pollPriority);
+	/**
+	 * @brief Construct a new temporary instance.
+	 * @param isSet whether this is a set message.
+	 * @param isPassive true if message can only be initiated by a participant other than us,
+	 * false if message can be initiated by any participant.
+	 * @param pb the primary ID byte.
+	 * @param sb the secondary ID byte.
+	 * @param data the @a DataField for encoding/decoding the message.
+	 */
+	Message(const bool isSet, const bool isPassive,
+			const unsigned char pb, const unsigned char sb,
+			DataField* data);
 	/**
 	 * @brief Destructor.
 	 */
@@ -129,13 +141,16 @@ public:
 
 	/**
 	 * @brief Prepare the master @a SymbolString for sending a query or command to the bus.
+	 * @param srcAddress the source address to set.
 	 * @param masterData the master data @a SymbolString for writing symbols to.
 	 * @param input the @a istringstream to parse the formatted value(s) from.
 	 * @param separator the separator character between multiple fields.
+	 * @param dstAddress the destination address to set, or @a SYN to keep the address defined during construction.
 	 * @return @a RESULT_OK on success, or an error code.
 	 */
 	result_t prepareMaster(const unsigned char srcAddress, SymbolString& masterData,
-			istringstream& input, char separator=UI_FIELD_SEPARATOR);
+			istringstream& input, char separator=UI_FIELD_SEPARATOR,
+			const unsigned char dstAddress=SYN);
 
 	/**
 	 * @brief Prepare the slave @a SymbolString for sending an answer to the bus.
@@ -199,7 +214,7 @@ private:
 	/** the destination address. */
 	const unsigned char m_dstAddress;
 	/** the primary, secondary, and optionally further command ID bytes. */
-	const vector<unsigned char> m_id;
+	vector<unsigned char> m_id;
 	/** the key for storing in @a MessageSet. */
 	unsigned long long m_key;
 	/** the @a DataField for encoding/decoding the message. */