diff --git a/ext/etc/etc.c b/ext/etc/etc.c
index 78657b43d0..d8aef4d7aa 100644
--- a/ext/etc/etc.c
+++ b/ext/etc/etc.c
@@ -56,7 +56,7 @@ static VALUE sGroup;
 #endif
 char *getlogin(void);
 
-#define RUBY_ETC_VERSION "1.4.2"
+#define RUBY_ETC_VERSION "1.4.3.dev.1"
 
 #ifdef HAVE_RB_DEPRECATE_CONSTANT
 void rb_deprecate_constant(VALUE mod, const char *name);