diff --git a/src/Makevars.win b/src/Makevars.win
index 80f03cba..eb0d2201 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -1,2 +1,3 @@
 PKG_CXXFLAGS = $(SHLIB_OPENMP_CXXFLAGS) -I../inst/include/ -DRCPP_NO_MODULES
 PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) $(SHLIB_OPENMP_CXXFLAGS)
+CXX_STD = CXX14