diff --git a/R/src/Makevars b/R/src/Makevars
index 8b13789..72dc4e5 100644
--- a/R/src/Makevars
+++ b/R/src/Makevars
@@ -1 +1,2 @@
-
+CXX_STD = CXX11
+PKG_CPPFLAGS = -I../inst/include -DCOMPILING_DPLYR -DBOOST_NO_INT64_T -DBOOST_NO_INTEGRAL_INT64_T -DBOOST_NO_LONG_LONG -DRCPP_USING_UTF8_ERROR_STRING