Index: /trunk/Config.kmk
===================================================================
--- /trunk/Config.kmk	(revision 71839)
+++ /trunk/Config.kmk	(revision 71840)
@@ -7300,5 +7300,5 @@
 
 # Java compiler options, needs some version checking.
-ifneq ($(int-ge $(VBOX_JAVA_VERSION),10900),)
+if defined(VBOX_JAVA_VERSION) && $(VBOX_JAVA_VERSION) >= 10900
  VBOX_JAVA_WS_OPTS ?= --add-modules java.xml.ws
 endif