diff --git a/R-package/R/xgb.importance.R b/R-package/R/xgb.importance.R
index 4e22efd19..c916a02f6 100644
--- a/R-package/R/xgb.importance.R
+++ b/R-package/R/xgb.importance.R
@@ -131,4 +131,4 @@ linearDump <- function(feature_names, text){
 # Avoid error messages during CRAN check.
 # The reason is that these variables are never declared
 # They are mainly column names inferred by Data.table...
-globalVariables(c(".", "Feature", "Split", "No", "Missing"))
+globalVariables(c(".", "Feature", "Split", "No", "Missing", "MissingNo", "RealCover"))