diff --git a/src/blackcore/vatsim/voicevatlib.h b/src/blackcore/vatsim/voicevatlib.h
index adce13c68..e7576dad6 100644
--- a/src/blackcore/vatsim/voicevatlib.h
+++ b/src/blackcore/vatsim/voicevatlib.h
@@ -32,7 +32,7 @@ template <class T> class QSharedPointer;
 #ifndef NOMINMAX
 #define NOMINMAX
 #endif
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 namespace BlackCore
diff --git a/src/blackmisc/librarypath.cpp b/src/blackmisc/librarypath.cpp
index 9605c2a37..1f80affa1 100644
--- a/src/blackmisc/librarypath.cpp
+++ b/src/blackmisc/librarypath.cpp
@@ -13,7 +13,7 @@
 #include <vector>
 
 #ifdef Q_OS_WIN
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 namespace BlackMisc
diff --git a/src/blackmisc/processctrl.cpp b/src/blackmisc/processctrl.cpp
index 5766cdfce..2ff8bd707 100644
--- a/src/blackmisc/processctrl.cpp
+++ b/src/blackmisc/processctrl.cpp
@@ -13,12 +13,11 @@
 #include <array>
 
 #ifdef Q_OS_WIN
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 namespace BlackMisc
 {
-
     CProcessCtrl::CProcessCtrl(QObject *parent) :
         QProcess(parent)
     { }
diff --git a/src/blackmisc/simulation/fsx/simconnectutilities.h b/src/blackmisc/simulation/fsx/simconnectutilities.h
index ade5cd37b..1e605816e 100644
--- a/src/blackmisc/simulation/fsx/simconnectutilities.h
+++ b/src/blackmisc/simulation/fsx/simconnectutilities.h
@@ -27,7 +27,7 @@
 #   ifndef NOMINMAX
 #       define NOMINMAX
 #   endif
-#   include <Windows.h>
+#   include <windows.h>
 #else
 using DWORD = unsigned long; //!< Fake Windows DWORD
 #endif
diff --git a/src/plugins/simulator/fscommon/fsuipc.cpp b/src/plugins/simulator/fscommon/fsuipc.cpp
index 6f6509903..8c8dc14e4 100644
--- a/src/plugins/simulator/fscommon/fsuipc.cpp
+++ b/src/plugins/simulator/fscommon/fsuipc.cpp
@@ -12,7 +12,7 @@
 #endif
 
 #include "fsuipc.h"
-#include <Windows.h>
+#include <windows.h>
 // bug in FSUIPC_User.h, windows.h not included, so we have to import it first
 #include "FSUIPC/FSUIPC_User.h"
 #include "FSUIPC/NewWeather.h"
@@ -242,7 +242,6 @@ namespace BlackSimPlugin
             qint16 numberOfEngines = 0;
             qint16 engine1CombustionFlag = 0, engine2CombustionFlag = 0, engine3CombustionFlag = 0, engine4CombustionFlag = 0;
 
-
             // http://www.projectmagenta.com/all-fsuipc-offsets/
             // https://www.ivao.aero/softdev/ivap/fsuipc_sdk.asp
             // http://squawkbox.ca/doc/sdk/fsuipc.php