diff --git a/inc/Message.hpp b/inc/Message.hpp
index 93bc12d0affa8bee962ef0bd2d25b709abba81f6..5747a2111c5ed740c55a50edb325becc626d9670 100644
--- a/inc/Message.hpp
+++ b/inc/Message.hpp
@@ -81,7 +81,9 @@ public:
 	 *
 	 * PTC = 1, PFC = 0
 	 */
-	void appendBoolean(bool value);
+	void appendBoolean(bool value) {
+		return appendByte(static_cast<uint8_t>(value));
+	}
 
 	/**
 	 * Adds an enumerated parameter consisting of an arbitrary number of bits to the end of the
@@ -96,70 +98,92 @@ public:
 	 *
 	 * PTC = 1, PFC = 8
 	 */
-	void appendEnumerated(uint8_t value);
+	void appendEnumerated(uint8_t value) {
+		return appendByte(value);
+	};
 
 	/**
 	 * Adds an enumerated parameter consisting of 2 bytes to the end of the message
 	 *
 	 * PTC = 1, PFC = 16
 	 */
-	void appendEnumerated(uint16_t value);
+	void appendEnumerated(uint16_t value) {
+		return appendHalfword(value);
+	}
 
 	/**
 	 * Adds an enumerated parameter consisting of 4 bytes to the end of the message
 	 *
 	 * PTC = 1, PFC = 32
 	 */
-	void appendEnumerated(uint32_t value);
+	void appendEnumerated(uint32_t value) {
+		return appendWord(value);
+	}
 
 	/**
 	 * Adds a 1 byte unsigned integer to the end of the message
 	 *
 	 * PTC = 2, PFC = 4
 	 */
-	void appendInteger(uint8_t value);
+	void appendInteger(uint8_t value) {
+		return appendByte(value);
+	}
 
 	/**
 	 * Adds a 2 byte unsigned integer to the end of the message
 	 *
 	 * PTC = 2, PFC = 8
 	 */
-	void appendInteger(uint16_t value);
+	void appendInteger(uint16_t value) {
+		return appendHalfword(value);
+	}
 
 	/**
 	 * Adds a 4 byte unsigned integer to the end of the message
 	 *
 	 * PTC = 2, PFC = 14
 	 */
-	void appendInteger(uint32_t value);
+	void appendInteger(uint32_t value) {
+		return appendWord(value);
+	}
 
 	/**
 	 * Adds a 1 byte signed integer to the end of the message
 	 *
 	 * PTC = 3, PFC = 4
 	 */
-	void appendInteger(int8_t value);
+	void appendInteger(int8_t value) {
+		return appendByte(reinterpret_cast<uint8_t&>(value));
+	}
 
 	/**
 	 * Adds a 2 byte signed integer to the end of the message
 	 *
 	 * PTC = 3, PFC = 8
 	 */
-	void appendInteger(int16_t value);
+	void appendInteger(int16_t value) {
+		return appendHalfword(reinterpret_cast<uint16_t&>(value));
+	}
 
 	/**
 	 * Adds a 4 byte signed integer to the end of the message
 	 *
 	 * PTC = 3, PFC = 14
 	 */
-	void appendInteger(int32_t value);
+	void appendInteger(int32_t value) {
+		return appendWord(reinterpret_cast<uint32_t&>(value));
+	}
 
 	/**
 	 * Adds a 4-byte single-precision floating point number to the end of the message
 	 *
 	 * PTC = 5, PFC = 1
 	 */
-	void appendReal(float value);
+	void appendReal(float value) {
+		static_assert(sizeof(uint32_t) == sizeof(value), "Floating point numbers must be 32 bits long");
+
+		return appendWord(reinterpret_cast<uint32_t&>(value));
+	}
 };
 
 
diff --git a/src/Message.cpp b/src/Message.cpp
index 61ef26afb70971833089ecad58324a7011bcd68a..eb9335d04fe240b82fd57768985b874935ee28a1 100644
--- a/src/Message.cpp
+++ b/src/Message.cpp
@@ -65,59 +65,13 @@ void Message::appendString(uint8_t size, const char *value) {
     dataSize += size;
 }
 
-void Message::appendBoolean(bool value) {
-    return appendByte(static_cast<uint8_t>(value));
-}
-
-inline void Message::appendEnumerated(uint8_t bits, uint32_t value) {
+void Message::appendEnumerated(uint8_t bits, uint32_t value) {
     // TODO: Implement 32-bit enums, if needed
     assert((value & 0xffff0000) != 0);
 
     return appendBits(bits, value);
 }
 
-inline void Message::appendEnumerated(uint8_t value) {
-    return appendByte(value);
-}
-
-inline void Message::appendEnumerated(uint16_t value) {
-    return appendHalfword(value);
-}
-
-inline void Message::appendEnumerated(uint32_t value) {
-    return appendWord(value);
-}
-
-inline void Message::appendInteger(uint8_t value) {
-    return appendByte(value);
-}
-
-inline void Message::appendInteger(uint16_t value) {
-    return appendHalfword(value);
-}
-
-inline void Message::appendInteger(uint32_t value) {
-    return appendWord(value);
-}
-
-inline void Message::appendInteger(int8_t value) {
-    return appendByte(static_cast<uint8_t>(value));
-}
-
-void Message::appendInteger(int16_t value) {
-    return appendHalfword(static_cast<uint8_t>(value));
-}
-
-void Message::appendInteger(int32_t value) {
-    return appendWord(static_cast<uint8_t>(value));
-}
-
-void Message::appendReal(float value) {
-    static_assert(sizeof(uint32_t) == sizeof(value), "Floating point numbers must be 32 bits long");
-
-    return appendWord(reinterpret_cast<uint32_t&>(value));
-}
-
 Message::Message(uint8_t serviceType, uint8_t messageType, Message::PacketType packetType,
                  uint16_t applicationId) : serviceType(serviceType), messageType(messageType),
                                            packetType(packetType), applicationId(applicationId) {}
diff --git a/src/Services/TestService.cpp b/src/Services/TestService.cpp
index 6335e3adf3b24b2cafab1c0e3232976155c5109f..674b19db93c3e699e3e7699f85a31f98547a8e58 100644
--- a/src/Services/TestService.cpp
+++ b/src/Services/TestService.cpp
@@ -1,6 +1,3 @@
-
-#include <Services/TestService.hpp>
-
 #include "Services/TestService.hpp"
 
 void TestService::areYouAlive(const Message &request) {