1diff --git a/kBuild/units/qt5.kmk b/kBuild/units/qt5.kmk
2index 71b96a3..73391f0 100644
3--- a/kBuild/units/qt5.kmk
4+++ b/kBuild/units/qt5.kmk
5@@ -1019,9 +1019,10 @@ else
6 $(eval $(target)_LIBS += $(PATH_SDK_QT5_LIB)/$(qt_prefix)qtmain$(qt_infix)$(SUFF_LIB) )
7 endif
8 else
9- $(eval $(target)_LIBS += $(foreach module,$(qt_modules), $(PATH_SDK_QT5_LIB)/lib$(qt_prefix)Qt5$(module)$(qt_infix)$(SUFF_DLL)) )
10+ $(eval $(target)_LIBS += $(foreach module,$(qt_modules), $(PATH_SDK_QT5_LIB)/lib$(qt_prefix)Qt5$(module)$(qt_infix)$(SUFF_DLL)) \
11+ $(PATH_QT5_X11_EXTRAS_LIB)/lib$(qt_prefix)Qt5X11Extras$(qt_infix)$(SUFF_DLL))
12 endif
13- $(eval $(target)_INCS += $(addprefix $(PATH_SDK_QT5_INC)/Qt,$(qt_modules)) $(PATH_SDK_QT5_INC) )
14+ $(eval $(target)_INCS += $(addprefix $(PATH_SDK_QT5_INC)/Qt,$(qt_modules)) $(PATH_SDK_QT5_INC) $(PATH_QT5_X11_EXTRAS_INC)/QtX11Extras )
15 endif
16 $(eval $(target)_DEFS += $(foreach module,$(toupper $(qt_modules)), QT_$(module)_LIB) )
17
18diff --git a/src/VBox/Frontends/VirtualBox/Makefile.kmk b/src/VBox/Frontends/VirtualBox/Makefile.kmk
19index 3295bfefe7..796370623c 100644
20--- a/src/VBox/Frontends/VirtualBox/Makefile.kmk
21+++ b/src/VBox/Frontends/VirtualBox/Makefile.kmk
22@@ -916,9 +916,6 @@ endif
23 # The Qt modules we're using.
24 # (The include directory and lib/framework for each module will be added by the Qt unit.)
25 VirtualBox_QT_MODULES = Core Gui Widgets PrintSupport
26-VirtualBox_QT_MODULES.linux += X11Extras
27-VirtualBox_QT_MODULES.solaris += X11Extras
28-VirtualBox_QT_MODULES.freebsd += X11Extras
29 VirtualBox_QT_MODULES.darwin += MacExtras
30 VirtualBox_QT_MODULES.win += WinExtras
31 if defined(VBOX_WITH_VIDEOHWACCEL) || defined(VBOX_GUI_USE_QGL)