diff --git a/configure.ac b/configure.ac
index 60d4cc78403f1cbc10b0a984117176f69bdab975..315bd2df3593e86b6a5029d7f29bac9820bc9795 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@ dnl Copyright (c) 2007-2015, The Tor Project, Inc.
 dnl See LICENSE for licensing information
 
 AC_PREREQ([2.63])
-AC_INIT([tor],[0.3.0.12])
+AC_INIT([tor],[0.3.0.12-dev])
 AC_CONFIG_SRCDIR([src/or/main.c])
 AC_CONFIG_MACRO_DIR([m4])
 
diff --git a/contrib/win32build/tor-mingw.nsi.in b/contrib/win32build/tor-mingw.nsi.in
index a179d8483ed2654ed7fcb306a638ff908bf88903..160ef26750ee049861c8b4bf514b41b9e7d4d642 100644
--- a/contrib/win32build/tor-mingw.nsi.in
+++ b/contrib/win32build/tor-mingw.nsi.in
@@ -8,7 +8,7 @@
 !include "LogicLib.nsh"
 !include "FileFunc.nsh"
 !insertmacro GetParameters
-!define VERSION "0.3.0.12"
+!define VERSION "0.3.0.12-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 47a00dc6d67aa2f01006b61d23fbde15fa9d3934..f5a7451a5335e5effd492ee9f2b0ec10a4cb7f76 100644
--- a/src/win32/orconfig.h
+++ b/src/win32/orconfig.h
@@ -218,7 +218,7 @@
 #define USING_TWOS_COMPLEMENT
 
 /* Version number of package */
-#define VERSION "0.3.0.12"
+#define VERSION "0.3.0.12-dev"