diff --git a/Makefile b/Makefile
index db3154640..5a51563f6 100644
--- a/Makefile
+++ b/Makefile
@@ -92,7 +92,8 @@ Rpack:
 	cp ./LICENSE xgboost
 	cat R-package/src/Makevars|sed '2s/.*/PKGROOT=./' > xgboost/src/Makevars
 	cp xgboost/src/Makevars xgboost/src/Makevars.win
-	R CMD build --no-build-vignettes xgboost
+	#R CMD build --no-build-vignettes xgboost
+	R CMD build xgboost
 	rm -rf xgboost
 	R CMD check --as-cran xgboost*.tar.gz
 
diff --git a/R-package/DESCRIPTION b/R-package/DESCRIPTION
index 16b999421..4970c51a3 100644
--- a/R-package/DESCRIPTION
+++ b/R-package/DESCRIPTION
@@ -29,4 +29,5 @@ Imports:
     stringr (>= 0.6.2),
     DiagrammeR (>= 0.4),
     ggplot2 (>= 1.0.0),
-    Ckmeans.1d.dp (>= 3.3.1)
+    Ckmeans.1d.dp (>= 3.3.1),
+    vcd (>= 1.3)
diff --git a/R-package/NAMESPACE b/R-package/NAMESPACE
index 23082bb46..37a158d6b 100644
--- a/R-package/NAMESPACE
+++ b/R-package/NAMESPACE
@@ -51,3 +51,4 @@ importFrom(stringr,str_match)
 importFrom(stringr,str_replace)
 importFrom(stringr,str_split)
 importFrom(stringr,str_trim)
+import(vcd)