diff --git a/configure.in b/configure.in
index 62a4d8ba8f..e92eb5e74a 100644
--- a/configure.in
+++ b/configure.in
@@ -4,7 +4,7 @@ dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
 dnl See LICENSE for licensing information
 
 AC_INIT
-AM_INIT_AUTOMAKE(tor, 0.1.2.3-alpha)
+AM_INIT_AUTOMAKE(tor, 0.1.2.3-alpha-dev)
 AM_CONFIG_HEADER(orconfig.h)
 
 AC_CANONICAL_HOST
diff --git a/contrib/tor.nsi.in b/contrib/tor.nsi.in
index 410864db3f..805997c685 100644
--- a/contrib/tor.nsi.in
+++ b/contrib/tor.nsi.in
@@ -31,7 +31,7 @@
 
 !include "MUI.nsh"
 
-!define VERSION "0.1.2.3-alpha"
+!define VERSION "0.1.2.3-alpha-dev"
 !define INSTALLER "tor-${VERSION}-win32.exe"
 !define WEBSITE "http://tor.eff.org/"
 
diff --git a/src/win32/orconfig.h b/src/win32/orconfig.h
index 45bff525c2..dee212790b 100644
--- a/src/win32/orconfig.h
+++ b/src/win32/orconfig.h
@@ -224,5 +224,5 @@
 #define USING_TWOS_COMPLEMENT
 
 /* Version number of package */
-#define VERSION "0.1.2.3-alpha"
+#define VERSION "0.1.2.3-alpha-dev"