Index: /trunk/src/VBox/Additions/x11/vboxmouse/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Additions/x11/vboxmouse/Makefile.kmk	(revision 58943)
+++ /trunk/src/VBox/Additions/x11/vboxmouse/Makefile.kmk	(revision 58944)
@@ -38,5 +38,5 @@
  vboxmouse_drv_DEFS.amd64 += _XSERVER64
  vboxmouse_drv_DEFS += \
-        _POSIX_C_SOURCE=199309L _POSIX_SOURCE _XOPEN_SOURCE \
+        _POSIX_C_SOURCE=199309L _POSIX_SOURCE _XOPEN_SOURCE _DEFAULT_SOURCE \
 	_BSD_SOURCE _SVID_SOURCE _GNU_SOURCE SHAPE XINPUT XKB LBX XAPPGROUP \
 	XCSECURITY TOGCUP XF86BIGFONT DPMSExtension PIXPRIV PANORAMIX RENDER \
Index: /trunk/src/VBox/Additions/x11/vboxvideo/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Additions/x11/vboxvideo/Makefile.kmk	(revision 58943)
+++ /trunk/src/VBox/Additions/x11/vboxvideo/Makefile.kmk	(revision 58944)
@@ -64,5 +64,5 @@
 vboxvideo_drv_DEFS.amd64 += _XSERVER64
 vboxvideo_drv_DEFS = \
-	_POSIX_C_SOURCE=199309L _POSIX_SOURCE _XOPEN_SOURCE \
+	_POSIX_C_SOURCE=199309L _POSIX_SOURCE _XOPEN_SOURCE _DEFAULT_SOURCE \
 	_BSD_SOURCE _SVID_SOURCE _GNU_SOURCE SHAPE XINPUT XKB LBX XAPPGROUP \
 	XCSECURITY TOGCUP XF86BIGFONT DPMSExtension PIXPRIV PANORAMIX RENDER \
Index: /trunk/src/libs/xpcom18a4/Makefile.kmk
===================================================================
--- /trunk/src/libs/xpcom18a4/Makefile.kmk	(revision 58943)
+++ /trunk/src/libs/xpcom18a4/Makefile.kmk	(revision 58944)
@@ -524,4 +524,5 @@
 	_BSD_SOURCE=1 \
 	_SVID_SOURCE=1 \
+	_DEFAULT_SOURCE \
 	_REENTRANT=1 \
 	_LARGEFILE64_SOURCE=1 \