diff --git a/.gitignore b/.gitignore
index 09af6808d6471e4509f98c274bec7aadb1336029..40d6e6ca0fe0c3d38ee57cc4c4f7cff3116d4b1c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,6 +56,7 @@ nbproject
 
 # Cloud9IDE
 .settings.xml
+.c9revisions
 
 # vim ex mode
 .vimrc