diff --git a/include/version.h b/include/version.h
index 2b75fba97..3d1ae5604 100644
--- a/include/version.h
+++ b/include/version.h
@@ -4,7 +4,7 @@
 #include <config.h>
 #define RADIANT_VERSION PACKAGE_VERSION
 #else
-#define RADIANT_VERSION "3.8.0"
+#define RADIANT_VERSION "3.9.0pre1"
 #endif
 
 #define RADIANT_APPNAME "DarkRadiant"