diff --git a/src/3rdParty/3Dconnexion/inc/SpaceMouse/CCookieCollection.hpp b/src/3rdParty/3Dconnexion/inc/SpaceMouse/CCookieCollection.hpp
index 4b810ee647..3823f8eb7c 100644
--- a/src/3rdParty/3Dconnexion/inc/SpaceMouse/CCookieCollection.hpp
+++ b/src/3rdParty/3Dconnexion/inc/SpaceMouse/CCookieCollection.hpp
@@ -18,6 +18,7 @@
 // </history>
 #include <navlib/navlib_types.h>
 // stdlib
+#include <chrono>
 #include <map>
 #include <memory>
 #include <stdexcept>
diff --git a/src/Mod/TechDraw/Gui/QGIDatumLabel.cpp b/src/Mod/TechDraw/Gui/QGIDatumLabel.cpp
index f3ebb6879d..bd92faf845 100644
--- a/src/Mod/TechDraw/Gui/QGIDatumLabel.cpp
+++ b/src/Mod/TechDraw/Gui/QGIDatumLabel.cpp
@@ -20,8 +20,11 @@
  *                                                                         *
  ***************************************************************************/
 
+#include "PreCompiled.h"
+#ifndef _PreComp_
 #include <QApplication>
 #include <QGraphicsSceneMouseEvent>
+#endif
 
 #include <Gui/Application.h>
 #include <Mod/TechDraw/App/DimensionFormatter.h>