diff --git a/R-package/src/Makevars.win b/R-package/src/Makevars.win
new file mode 100644
index 000000000..013eb5a78
--- /dev/null
+++ b/R-package/src/Makevars.win
@@ -0,0 +1,27 @@
+# _*_ mode: Makefile; _*_
+export CC  = gcc
+export CXX = g++
+
+# expose these flags to R CMD SHLIB
+PKG_CPPFLAGS = -O3 -Wno-unknown-pragmas  -DXGBOOST_CUSTOMIZE_ERROR_ -fopenmp -fPIC
+
+ifeq ($(no_omp),1)
+	PKG_CPPFLAGS += -D -DDISABLE_OPENMP 
+endif
+
+CXXOBJ= xgboost_wrapper.o xgboost_io.o
+OBJECTS= xgboost_R.o $(CXXOBJ)
+
+.PHONY: all clean
+all: $(SHLIB)
+$(SHLIB): $(OBJECTS)
+
+xgboost_wrapper.o: ../../wrapper/xgboost_wrapper.cpp
+xgboost_io.o: ../../src/io/io.cpp
+
+$(CXXOBJ) : 
+	$(CXX) -c $(PKG_CPPFLAGS) -o $@ $(firstword $(filter %.cpp %.c, $^) )
+
+clean:
+	rm -rf *.so *.o *~ *.dll
+