diff --git a/configure.in b/configure.in
index 5d18bf3630..52ae5cc873 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 d05e6ab805..807d222209 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 904caefaba..e2075d636b 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"