Index: /trunk/src/VBox/Devices/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Devices/Makefile.kmk	(revision 42494)
+++ /trunk/src/VBox/Devices/Makefile.kmk	(revision 42495)
@@ -1123,5 +1123,7 @@
   tstIntNetR0_SOURCES     = \
  	Network/testcase/tstIntNetR0.cpp
- Network/testcase/tstIntNetR0.cpp_CXXFLAGS := $(if-expr $(KBUILD_TARGET) == "win",,$(VBOX_GCC_Wno-array_bounds))
+  ifeq ($(KBUILD_TARGET),win)
+   Network/testcase/tstIntNetR0.cpp_CXXFLAGS = $(VBOX_GCC_Wno-array_bounds)
+  endif
  endif