diff --git a/Doc/Makefile b/Doc/Makefile
index 22c88f4..c9045ce 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -67,7 +67,7 @@
 
 # This is the *documentation* release, and is used to construct the file
 # names of the downloadable tarballs.
-RELEASE=2.1
+RELEASE=2.2a0
 
 PYTHON=	   python
 DVIPS=	   dvips -N0 -t $(PAPER)