Index: /trunk/src/VBox/Frontends/VirtualBox/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/Makefile.kmk	(revision 71864)
+++ /trunk/src/VBox/Frontends/VirtualBox/Makefile.kmk	(revision 71865)
@@ -440,5 +440,4 @@
 VirtualBox_QT_MOCHDRS = \
 	src/UITakeSnapshotDialog.h \
-	src/extensions/QIComboBox.h \
 	src/extensions/QIFlowLayout.h \
 	src/extensions/QILabelSeparator.h \
@@ -654,4 +653,5 @@
 	src/extensions/QIArrowButtonSwitch.h \
 	src/extensions/QIArrowSplitter.h \
+	src/extensions/QIComboBox.h \
 	src/extensions/QIDialog.h \
 	src/extensions/QIDialogButtonBox.h \
@@ -727,4 +727,5 @@
 	src/extensions/QIArrowButtonSwitch.h \
 	src/extensions/QIArrowSplitter.h \
+	src/extensions/QIComboBox.h \
 	src/extensions/QIDialog.h \
 	src/extensions/QIDialogButtonBox.h \
@@ -904,5 +905,4 @@
 	src/main.cpp \
 	src/UITakeSnapshotDialog.cpp \
-	src/extensions/QIComboBox.cpp \
 	src/extensions/QIFlowLayout.cpp \
 	src/extensions/QILabelSeparator.cpp \
@@ -1151,4 +1151,5 @@
 	src/extensions/QIArrowButtonSwitch.cpp \
 	src/extensions/QIArrowSplitter.cpp \
+	src/extensions/QIComboBox.cpp \
 	src/extensions/QIDialog.cpp \
 	src/extensions/QIDialogButtonBox.cpp \
@@ -1251,4 +1252,5 @@
 	src/extensions/QIArrowButtonSwitch.cpp \
 	src/extensions/QIArrowSplitter.cpp \
+	src/extensions/QIComboBox.cpp \
 	src/extensions/QIDialog.cpp \
 	src/extensions/QIDialogButtonBox.cpp \
Index: /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIComboBox.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIComboBox.cpp	(revision 71864)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIComboBox.cpp	(revision 71865)
@@ -1,9 +1,9 @@
 /* $Id$ */
 /** @file
- * VBox Qt GUI - VirtualBox Qt extensions: QIComboBox class implementation.
+ * VBox Qt GUI - Qt extensions: QIComboBox class implementation.
  */
 
 /*
- * Copyright (C) 2016-2017 Oracle Corporation
+ * Copyright (C) 2016-2018 Oracle Corporation
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as
@@ -336,3 +336,2 @@
     }
 }
-
Index: /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIComboBox.h
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIComboBox.h	(revision 71864)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QIComboBox.h	(revision 71865)
@@ -5,5 +5,5 @@
 
 /*
- * Copyright (C) 2016-2017 Oracle Corporation
+ * Copyright (C) 2016-2018 Oracle Corporation
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as
@@ -22,7 +22,9 @@
 #include <QComboBox>
 
+/* GUI includes: */
+#include "UILibraryDefs.h"
 
 /** QWidget subclass extending standard functionality of QComboBox. */
-class QIComboBox : public QWidget
+class SHARED_LIBRARY_STUFF QIComboBox : public QWidget
 {
     Q_OBJECT;