diff --git a/src/Base/PreCompiled.h b/src/Base/PreCompiled.h
index 791715b249..1764c97d15 100644
--- a/src/Base/PreCompiled.h
+++ b/src/Base/PreCompiled.h
@@ -76,6 +76,7 @@
 #include <memory>
 #include <mutex>
 #include <bitset>
+#include <algorithm>
 
 // streams
 #include <iostream>
diff --git a/src/Base/Sequencer.cpp b/src/Base/Sequencer.cpp
index 3ab27b74be..e573943917 100644
--- a/src/Base/Sequencer.cpp
+++ b/src/Base/Sequencer.cpp
@@ -26,6 +26,7 @@
 #ifndef _PreComp_
 #include <mutex>
 #include <vector>
+#include <algorithm>
 #endif
 
 #include "Sequencer.h"
diff --git a/src/Mod/Start/Gui/GeneralSettingsWidget.h b/src/Mod/Start/Gui/GeneralSettingsWidget.h
index 79aa0dea54..7f596d83ee 100644
--- a/src/Mod/Start/Gui/GeneralSettingsWidget.h
+++ b/src/Mod/Start/Gui/GeneralSettingsWidget.h
@@ -25,7 +25,7 @@
 #define FREECAD_START_GENERALSETTINGSWIDGET_H
 
 #include <QWidget>
-#include <3rdParty/GSL/include/gsl/pointers>
+#include <gsl/pointers>
 
 class QLabel;
 class QComboBox;
diff --git a/src/Mod/Start/Gui/ThemeSelectorWidget.cpp b/src/Mod/Start/Gui/ThemeSelectorWidget.cpp
index 7226659a9e..e8eaadb6bc 100644
--- a/src/Mod/Start/Gui/ThemeSelectorWidget.cpp
+++ b/src/Mod/Start/Gui/ThemeSelectorWidget.cpp
@@ -31,7 +31,7 @@
 #endif
 
 #include "ThemeSelectorWidget.h"
-#include <3rdParty/GSL/include/gsl/pointers>
+#include <gsl/pointers>
 #include <App/Application.h>
 #include <Gui/Application.h>
 #include <Gui/PreferencePackManager.h>