diff --git a/R-package/DESCRIPTION b/R-package/DESCRIPTION
index 63ed9581c..adc1635e0 100644
--- a/R-package/DESCRIPTION
+++ b/R-package/DESCRIPTION
@@ -17,6 +17,7 @@ Description: This package is a R wrapper of xgboost, which is short for eXtreme
 License: Apache License (== 2.0) | file LICENSE
 URL: https://github.com/tqchen/xgboost
 BugReports: https://github.com/tqchen/xgboost/issues
+VignetteBuilder: knitr
 Depends:
     R (>= 2.10)
 Imports: