diff --git a/contrib/tor-mingw.nsi.in b/contrib/tor-mingw.nsi.in
index 1ccc1e728..1e578cd4a 100644
--- a/contrib/tor-mingw.nsi.in
+++ b/contrib/tor-mingw.nsi.in
@@ -8,7 +8,7 @@
 !include "LogicLib.nsh"
 !include "FileFunc.nsh"
 !insertmacro GetParameters
-!define VERSION "0.2.4.25"
+!define VERSION "0.2.4.25-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 c866bbb2c..d3f3eb19a 100644
--- a/src/win32/orconfig.h
+++ b/src/win32/orconfig.h
@@ -241,7 +241,7 @@
 #define USING_TWOS_COMPLEMENT
 
 /* Version number of package */
-#define VERSION "0.2.4.25"
+#define VERSION "0.2.4.25-dev"