diff --git a/ChangeLog b/ChangeLog
index af3dc8c0..708d0629 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -8,6 +8,7 @@ Changes in 1.4.2:
  o Use a 64-bit field to hold HTTP content-lengths.  Patch from Scott Lamb.
  o Allow regression code to build even without Python installed
  o remove NDEBUG ifdefs from evdns.c
+ o udpate documentation of event_loop and event_base_loop; from Tani Hosokawa.
 
 Changes in 1.4.1-beta:
  o free minheap on event_base_free(); from Christopher Layne
diff --git a/event.h b/event.h
index 4d42bebf..451ca895 100644
--- a/event.h
+++ b/event.h
@@ -368,7 +368,8 @@ int event_base_set(struct event_base *, struct event *);
   This is a more flexible version of event_dispatch().
 
   @param flags any combination of EVLOOP_ONCE | EVLOOP_NONBLOCK
-  @return 0 if successful, or -1 if an error occurred
+  @return 0 if successful, -1 if an error occurred, or 1 if no events were
+    registered.
   @see event_loopexit(), event_base_loop()
 */
 int event_loop(int);
@@ -380,7 +381,8 @@ int event_loop(int);
 
   @param eb the event_base structure returned by event_init()
   @param flags any combination of EVLOOP_ONCE | EVLOOP_NONBLOCK
-  @return 0 if successful, or -1 if an error occurred
+  @return 0 if successful, -1 if an error occurred, or 1 if no events were
+    registered.
   @see event_loopexit(), event_base_loop()
   */
 int event_base_loop(struct event_base *, int);