diff --git a/.gitignore b/.gitignore
index 6ea4dd528b..128a42f932 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,38 +1,41 @@
 .DS_Store
 ._*
 /webroot/rsrc/custom
 .#*
 *#
 *~
 *.swp
 
 # NetBeans project files
 /nbproject/
 
 # PhpStorm project files
 .idea/
 
 # Arcanist scratch directory
 /.arc
 
 # Diviner
 /docs/
 /.divinercache
 
 # libphutil
 /src/.phutil_module_cache
 
 # Configuration
 /conf/custom/*
 /conf/local/local.json
 /conf/local/ENVIRONMENT
 /conf/local/VERSION
 
 # Impact Font
 /resources/font/impact.ttf
 
 # User-accessible hook for adhoc debugging scripts
 /support/debug.php
 
 # Users can link binaries here
 /support/bin/*
+
+# User extensions
+/src/extensions/*