diff --git a/R-package/src/Makevars b/R-package/src/Makevars
index d75c51d08..e03a15425 100644
--- a/R-package/src/Makevars
+++ b/R-package/src/Makevars
@@ -4,18 +4,6 @@ PKGROOT=../../
 PKG_CPPFLAGS= -DXGBOOST_CUSTOMIZE_MSG_ -DXGBOOST_CUSTOMIZE_PRNG_ -I$(PKGROOT)  
 PKG_CXXFLAGS= $(SHLIB_OPENMP_CFLAGS)
 PKG_LIBS = $(SHLIB_OPENMP_CFLAGS)
+OBJECTS= xgboost_R.o $(PKGROOT)/wrapper/xgboost_wrapper.o $(PKGROOT)/src/io/io.o $(PKGROOT)/src/gbm/gbm.o $(PKGROOT)/src/tree/updater.o
 
-CXXOBJ= $(PKGROOT)/wrapper/xgboost_wrapper.o\
-		$(PKGROOT)/src/io/io.o\
-		$(PKGROOT)/src/gbm/gbm.o\
-		$(PKGROOT)/src/tree/updater.o
-
-OBJECTS= xgboost_R.o $(CXXOBJ)
-
-.PHONY: all clean
-all: $(SHLIB)
-$(SHLIB): $(OBJECTS)
-
-clean:
-	rm -rf *.so *.o *~ *.dll $(OBJECTS)
 
diff --git a/R-package/src/Makevars.win b/R-package/src/Makevars.win
index e4f65cbef..aec0d2c89 100644
--- a/R-package/src/Makevars.win
+++ b/R-package/src/Makevars.win
@@ -4,17 +4,4 @@ PKGROOT=../../
 PKG_CPPFLAGS= -DXGBOOST_CUSTOMIZE_MSG_ -DXGBOOST_CUSTOMIZE_PRNG_ -I$(PKGROOT)  
 PKG_CXXFLAGS= $(SHLIB_OPENMP_CFLAGS)
 PKG_LIBS = $(SHLIB_OPENMP_CFLAGS)
-
-CXXOBJ= $(PKGROOT)/wrapper/xgboost_wrapper.o\
-		$(PKGROOT)/src/io/io.o\
-		$(PKGROOT)/src/gbm/gbm.o\
-		$(PKGROOT)/src/tree/updater.o
-
-OBJECTS= xgboost_R.o $(CXXOBJ)
-
-.PHONY: all clean
-all: $(SHLIB)
-$(SHLIB): $(OBJECTS)
-
-clean:
-	rm -rf *.so *.o *~ *.dll $(OBJECTS)
+OBJECTS= xgboost_R.o $(PKGROOT)/wrapper/xgboost_wrapper.o $(PKGROOT)/src/io/io.o $(PKGROOT)/src/gbm/gbm.o $(PKGROOT)/src/tree/updater.o