diff --git a/.gitignore b/.gitignore
index 09af6808d6..40d6e6ca0f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,6 +56,7 @@ nbproject
 
 # Cloud9IDE
 .settings.xml
+.c9revisions
 
 # vim ex mode
 .vimrc