diff --git a/.gitignore b/.gitignore
index 8b2c65f62..9fd1e0f72 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,6 +47,7 @@ Debug
 .Rproj.user
 *.cpage.col
 *.cpage
+*.Rproj
 xgboost
 xgboost.mpi
 xgboost.mock