diff --git a/configure.in b/configure.in
index 5d18bf36304246e588fe684f67889fc709f1fa26..52ae5cc87319d7a64b32f869dd2e1144ca900c87 100644
--- a/configure.in
+++ b/configure.in
@@ -5,7 +5,7 @@ dnl Copyright (c) 2007-2008, The Tor Project, Inc.
 dnl See LICENSE for licensing information
 
 AC_INIT
-AM_INIT_AUTOMAKE(tor, 0.2.1.5-alpha)
+AM_INIT_AUTOMAKE(tor, 0.2.1.5-alpha-dev)
 AM_CONFIG_HEADER(orconfig.h)
 
 AC_CANONICAL_HOST
diff --git a/contrib/tor-mingw.nsi.in b/contrib/tor-mingw.nsi.in
index d05e6ab8053f8334ff0bb42a0d0527f4a3277863..807d22220999592d222b895826a4fc6beb7c57ba 100644
--- a/contrib/tor-mingw.nsi.in
+++ b/contrib/tor-mingw.nsi.in
@@ -9,7 +9,7 @@
 !include "FileFunc.nsh"
 !insertmacro GetParameters
   
-!define VERSION "0.2.1.5-alpha"
+!define VERSION "0.2.1.5-alpha-dev"
 !define INSTALLER "tor-${VERSION}-win32.exe"
 !define WEBSITE "https://www.torproject.org/"
 !define LICENSE "LICENSE"
diff --git a/src/win32/orconfig.h b/src/win32/orconfig.h
index 904caefaba39de9292a090700ba3175c23a761df..e2075d636b5ab8a2c0c1f4368f165bcd2ef7a900 100644
--- a/src/win32/orconfig.h
+++ b/src/win32/orconfig.h
@@ -227,6 +227,6 @@
 #define USING_TWOS_COMPLEMENT
 
 /* Version number of package */
-#define VERSION "0.2.1.5-alpha"
+#define VERSION "0.2.1.5-alpha-dev"