diff --git a/Changes b/Changes
index 9167637..d1cd310 100644
--- a/Changes
+++ b/Changes
@@ -1,7 +1,6 @@
 Revision history for libev, a high-performance and full-featured event loop.
 
-TODO: revisit 59.x timer in the light of mdoenr powersaving
-4.27 (EV only)
+4.27 Thu Jun 27 22:43:44 CEST 2019
 	- linux aio backend almost complete rewritten to work around its
           limitations.
         - epoll backend now mandatory for linux aio backend.
diff --git a/configure.ac b/configure.ac
index b004dda..e19872c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl also update ev.h!
-AC_INIT([libev], [4.25])
+AC_INIT([libev], [4.27])
 
 orig_CFLAGS="$CFLAGS"
 
diff --git a/ev_vars.h b/ev_vars.h
index 1556e6b..2008240 100644
--- a/ev_vars.h
+++ b/ev_vars.h
@@ -109,7 +109,6 @@ VARx(int, epoll_epermmax)
 
 #if EV_USE_LINUXAIO || EV_GENWRAP
 VARx(aio_context_t, linuxaio_ctx)
-VARx(char, linuxaio_ringbuf_valid)
 VARx(int, linuxaio_iteration)
 VARx(struct aniocb **, linuxaio_iocbps)
 VARx(int, linuxaio_iocbpmax)