diff --git a/src/app/application.cpp b/src/app/application.cpp
index 624bcb664..6b332cf4e 100644
--- a/src/app/application.cpp
+++ b/src/app/application.cpp
@@ -37,7 +37,7 @@
 #ifndef DISABLE_GUI
 #include "gui/guiiconprovider.h"
 #ifdef Q_OS_WIN
-#include <Windows.h>
+#include <windows.h>
 #include <QSharedMemory>
 #include <QSessionManager>
 #endif // Q_OS_WIN
diff --git a/src/base/bittorrent/torrenthandle.cpp b/src/base/bittorrent/torrenthandle.cpp
index 1d1b2ea05..057f83a27 100644
--- a/src/base/bittorrent/torrenthandle.cpp
+++ b/src/base/bittorrent/torrenthandle.cpp
@@ -43,7 +43,7 @@
 #include <boost/bind.hpp>
 
 #ifdef Q_OS_WIN
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 #include "base/logger.h"
diff --git a/src/base/preferences.cpp b/src/base/preferences.cpp
index 29415b865..fc4de6ef8 100644
--- a/src/base/preferences.cpp
+++ b/src/base/preferences.cpp
@@ -47,7 +47,7 @@
 #endif
 
 #ifdef Q_OS_WIN
-#include <ShlObj.h>
+#include <shlobj.h>
 #include <winreg.h>
 #endif
 
diff --git a/src/base/utils/misc.cpp b/src/base/utils/misc.cpp
index 3a637b827..7e34f0a97 100644
--- a/src/base/utils/misc.cpp
+++ b/src/base/utils/misc.cpp
@@ -48,7 +48,7 @@
 
 #ifdef Q_OS_WIN
 #include <windows.h>
-#include <PowrProf.h>
+#include <powrprof.h>
 const int UNLEN = 256;
 #else
 #include <unistd.h>
diff --git a/src/gui/powermanagement/powermanagement.cpp b/src/gui/powermanagement/powermanagement.cpp
index ec07aa8d7..c51b22974 100644
--- a/src/gui/powermanagement/powermanagement.cpp
+++ b/src/gui/powermanagement/powermanagement.cpp
@@ -40,7 +40,7 @@
 #endif
 
 #ifdef Q_OS_WIN
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 PowerManagement::PowerManagement(QObject *parent) : QObject(parent), m_busy(false)