diff --git a/src/blackmisc/mixin/mixinstring.h b/src/blackmisc/mixin/mixinstring.h
index efa100b0b..c96325220 100644
--- a/src/blackmisc/mixin/mixinstring.h
+++ b/src/blackmisc/mixin/mixinstring.h
@@ -14,6 +14,7 @@
 #include <QTextStream>
 #include <QtGlobal>
 #include <string>
+#include <ostream>
 
 namespace BlackMisc::Mixin
 {
diff --git a/src/blackmisc/stacktrace.cpp b/src/blackmisc/stacktrace.cpp
index 003cd30d9..5abc3ed45 100644
--- a/src/blackmisc/stacktrace.cpp
+++ b/src/blackmisc/stacktrace.cpp
@@ -9,6 +9,7 @@
 #include <QMutexLocker>
 #include <array>
 #include <cstdlib>
+#include <mutex>
 
 #if defined(Q_CC_MSVC)
 #    include <Windows.h>
diff --git a/src/plugins/simulator/fsxcommon/simconnectwindows.h b/src/plugins/simulator/fsxcommon/simconnectwindows.h
index b7ca6d7a5..c0fe8052a 100644
--- a/src/plugins/simulator/fsxcommon/simconnectwindows.h
+++ b/src/plugins/simulator/fsxcommon/simconnectwindows.h
@@ -18,6 +18,8 @@
 #include <Windows.h>
 #include <SimConnect.h>
 
+#include <QtGlobal>
+
 #pragma pop_macro("interface")
 
 #ifndef Q_OS_WIN64