diff --git a/Markup.cpp b/Markup.cpp
index 1e0596d..7c8654a 100644
--- a/Markup.cpp
+++ b/Markup.cpp
@@ -10,12 +10,13 @@
 // This software is provided "as is", with no warranty.
 // Latest fixes enhancements and documentation at www.firstobject.com
 
+#include "Markup.h"
+
 #include <assert.h>
 #include <algorithm>
 #include <stdarg.h>
 #include <string.h>
 
-#include "Markup.h"
 
 #ifdef _DEBUG
 #undef THIS_FILE
diff --git a/RTPacket.cpp b/RTPacket.cpp
index f00e97a..a70b6a9 100644
--- a/RTPacket.cpp
+++ b/RTPacket.cpp
@@ -1,6 +1,8 @@
 #define _CRT_SECURE_NO_WARNINGS
 #define NOMINMAX
 
+#include "RTPacket.h"
+
 #include <memory.h>
 #include <float.h>
 #include <stdint.h>
@@ -12,7 +14,6 @@
 #include <arpa/inet.h>
 #endif
 
-#include "RTPacket.h"
 
 CRTPacket::CRTPacket(int nMajorVersion, int nMinorVersion, bool bBigEndian)
 {
diff --git a/RTProtocol.cpp b/RTProtocol.cpp
index 5dccf1c..0b779b7 100644
--- a/RTProtocol.cpp
+++ b/RTProtocol.cpp
@@ -1,6 +1,8 @@
 #define _CRT_SECURE_NO_WARNINGS
 #define NOMINMAX
 
+#include "RTProtocol.h"
+
 #include <float.h>
 #include <cctype>
 #include <thread>
@@ -13,7 +15,6 @@
 #include <iterator>
 #include <functional>
 
-#include "RTProtocol.h"
 #include "Markup.h"
 #include "Network.h"
 #include <stdexcept>