diff --git a/Makefile b/Makefile
index cddeb3c6f..6354479f3 100644
--- a/Makefile
+++ b/Makefile
@@ -94,8 +94,8 @@ Rpack:
 	cp xgboost/src/Makevars xgboost/src/Makevars.win
 	# R CMD build --no-build-vignettes xgboost
 	R CMD build xgboost
-	#rm -rf xgboost
-	#R CMD check --as-cran xgboost*.tar.gz
+	rm -rf xgboost
+	R CMD check --as-cran xgboost*.tar.gz
 
 clean:
 	$(RM) -rf $(OBJ) $(BIN) $(MPIBIN) $(MPIOBJ) $(SLIB) *.o  */*.o */*/*.o *~ */*~ */*/*~
diff --git a/R-package/NAMESPACE b/R-package/NAMESPACE
index 99c97c729..ac74b8434 100644
--- a/R-package/NAMESPACE
+++ b/R-package/NAMESPACE
@@ -52,3 +52,4 @@ importFrom(stringr,str_match)
 importFrom(stringr,str_replace)
 importFrom(stringr,str_split)
 importFrom(stringr,str_trim)
+import(vcd)