diff --git a/INSTALL.md b/INSTALL.md
index 1bf40ba5ada00a79d9ea9d9b8905788ee7a23d2e..1ae4234a09c3cee426aa92f6ad237a453d05b6b8 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1,5 +1,9 @@
 * install PostgreSQL 8.3+
 
+* install Rabbit MQ
+  This is needed for celery to work, which does background processing such as
+  the processing of uploaded list-of-voter CSV files.  
+
 * make sure you have virtualenv installed:
 http://www.virtualenv.org/en/latest/