diff --git a/src/Gui/CommandDoc.cpp b/src/Gui/CommandDoc.cpp
index ff1d0a78fc..4839ad7650 100644
--- a/src/Gui/CommandDoc.cpp
+++ b/src/Gui/CommandDoc.cpp
@@ -27,6 +27,7 @@
 # include <QApplication>
 # include <QClipboard>
 # include <QDateTime>
+# include <QMessageBox>
 # include <QTextStream>
 # include <QTreeWidgetItem> 
 #endif
diff --git a/src/Gui/propertyeditor/PropertyItem.cpp b/src/Gui/propertyeditor/PropertyItem.cpp
index 8c1a841615..f6887f7d1f 100644
--- a/src/Gui/propertyeditor/PropertyItem.cpp
+++ b/src/Gui/propertyeditor/PropertyItem.cpp
@@ -29,6 +29,7 @@
 # include <QComboBox>
 # include <QFontDatabase>
 # include <QLocale>
+# include <QMessageBox>
 # include <QPalette>
 # include <QPixmap>
 # include <QTextStream>