diff --git a/src/Makevars.win b/src/Makevars.win
index 64f53a87..e1d24ebb 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -1,3 +1,3 @@
 CXX_STD = CXX17
-PKG_CXXFLAGS = -w -D_GLIBCXX_USE_CXX11_ABI=0 
+PKG_CXXFLAGS = -w 
 PKG_LIBS= -lws2_32  -lboost_filesystem-mt-x64 
\ No newline at end of file