diff --git a/src/Makevars.win b/src/Makevars.win
index f96437c..c4f840d 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -1,3 +1,4 @@
+CXX_STD=CXX11
 PKG_CXXFLAGS=-I../inst/include -I"$(OPENCL_INC)"