1 files changed, 1 insertions, 0 deletions

diff --git a/doc/.document b/doc/.document
index 84c1be6e5e..03d332367c 100644
--- a/doc/.document
+++ b/doc/.document
@@ -1,6 +1,7 @@
 *.md
 *.rb
 *.rdoc
+contributing
 NEWS
 syntax
 optparse