diff --git a/src/ntwxwin.mak b/src/ntwxwin.mak
index d4c10fcf39..6ab7fc5ff8 100644
--- a/src/ntwxwin.mak
+++ b/src/ntwxwin.mak
@@ -146,9 +146,9 @@ PRECOMP=/YuWX/WXPREC.H /Fp$(WXDIR)\src\msw\$(PCH) /Fd$(WXDIR)\lib\wx.pdb
 MAKEPRECOMP=/YcWX/WXPREC.H
 !endif
 
-CPPFLAGS=$(WINFLAGS) $(DEBUG_FLAGS) $(PRECOMP) $(EXTRAFLAGS) /D__WXMSW__ $(INC) $(OPT) $(EXTRADLLFLAGS)  $(CRTFLAG) /D__WINDOWS__ /GX /DSTRICT
+CPPFLAGS=$(WINFLAGS) $(DEBUG_FLAGS) $(PRECOMP) $(EXTRAFLAGS) /D__WXMSW__ $(INC) $(OPT) $(EXTRADLLFLAGS)  $(CRTFLAG) /D__WINDOWS__ /GX /DSTRICT $(OVERRIDEFLAGS)
 # If you don't include wxprec.h, use CPPFLAGS2
-CPPFLAGS2=$(WINFLAGS) $(DEBUG_FLAGS) /D__WXMSW__ $(INC) $(EXTRAFLAGS) $(OPT) $(EXTRADLLFLAGS) $(CRTFLAG) /D__WINDOWS__ /GX /DSTRICT
+CPPFLAGS2=$(WINFLAGS) $(DEBUG_FLAGS) /D__WXMSW__ $(INC) $(EXTRAFLAGS) $(OPT) $(EXTRADLLFLAGS) $(CRTFLAG) /D__WINDOWS__ /GX /DSTRICT $(OVERRIDEFLAGS)
 LINKFLAGS=$(LINK_DEBUG_FLAGS) $(WINLINKFLAGS) -entry:WinMainCRTStartup
 DUMMY=dummy