3 files changed, 4 insertions, 3 deletions
diff --git a/Changes b/Changes
index f006e72..02009c9 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 Revision history for libev, a high-performance and full-featured event loop.
 
+        - change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
+
 4.00 Mon Oct 25 12:32:12 CEST 2010
 	- "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
 	- ev_embed_stop did not correctly stop the watcher (very good
diff --git a/ev++.h b/ev++.h
index 7207694..d85be55 100644
--- a/ev++.h
+++ b/ev++.h
@@ -58,8 +58,7 @@ namespace ev {
 
   typedef ev_tstamp tstamp;
 
-  enum
-  {
+  enum {
     UNDEF    = EV_UNDEF,
     NONE     = EV_NONE,
     READ     = EV_READ,
diff --git a/ev.h b/ev.h
index 69d49a8..7bf91e5 100644
--- a/ev.h
+++ b/ev.h
@@ -197,7 +197,7 @@ struct ev_loop;
 
 /* eventmask, revents, events... */
 enum {
-  EV_UNDEF    =         -1, /* guaranteed to be invalid */
+  EV_UNDEF    = 0xFFFFFFFF, /* guaranteed to be invalid */
   EV_NONE     =       0x00, /* no events */
   EV_READ     =       0x01, /* ev_io detected read will not block */
   EV_WRITE    =       0x02, /* ev_io detected write will not block */