diff --git a/src/Gui/CommandWindow.cpp b/src/Gui/CommandWindow.cpp
index 7411359993..3142ef2c49 100644
--- a/src/Gui/CommandWindow.cpp
+++ b/src/Gui/CommandWindow.cpp
@@ -23,6 +23,7 @@
 
 #include "PreCompiled.h"
 #ifndef _PreComp_
+# include <QCoreApplication>
 # include <QStatusBar>
 #endif
 
diff --git a/src/Gui/DlgActivateWindowImp.cpp b/src/Gui/DlgActivateWindowImp.cpp
index 1ec0b1eca8..cdd0054577 100644
--- a/src/Gui/DlgActivateWindowImp.cpp
+++ b/src/Gui/DlgActivateWindowImp.cpp
@@ -25,6 +25,7 @@
 #ifndef _PreComp_
 # include <QApplication>
 # include <QHeaderView>
+# include <QPushButton>
 #endif
 
 #include "DlgActivateWindowImp.h"
diff --git a/src/Gui/DlgCustomizeImp.cpp b/src/Gui/DlgCustomizeImp.cpp
index 4659c5d22c..4c1a36e9ce 100644
--- a/src/Gui/DlgCustomizeImp.cpp
+++ b/src/Gui/DlgCustomizeImp.cpp
@@ -22,6 +22,9 @@
 
 
 #include "PreCompiled.h"
+#ifndef _PreComp_
+# include <QPushButton>
+#endif
 
 #include "DlgCustomizeImp.h"
 #include "MainWindow.h"
diff --git a/src/Gui/DlgInputDialogImp.cpp b/src/Gui/DlgInputDialogImp.cpp
index 7f954d2c1b..e71f389793 100644
--- a/src/Gui/DlgInputDialogImp.cpp
+++ b/src/Gui/DlgInputDialogImp.cpp
@@ -22,6 +22,9 @@
 
 
 #include "PreCompiled.h"
+#ifndef _PreComp_
+# include <QPushButton>
+#endif
 
 #include "DlgInputDialogImp.h"
 #include "SpinBox.h"