diff --git a/ChangeLog b/ChangeLog
index edde2f3d..431339bd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,8 @@ Changes in 2.0.2-alpha:
  o Avoid data corruption when reading data entirely into the second-to-last chain of an evbuffer. [Bug report from Victor Goya]
  o Make sendfile work on FreeBSD
  o Do not use vararg macros for accessing evrpc structures; this is not backwards compatible, but we did not promise any backwards compatibility for the rpc code.
+ o Actually define the event_config_set_flag() function.
+
 
 Changes in 2.0.1-alpha:
  o free minheap on event_base_free(); from Christopher Layne
diff --git a/event.c b/event.c
index f15b3b24..bd2044fd 100644
--- a/event.c
+++ b/event.c
@@ -509,6 +509,17 @@ event_config_free(struct event_config *cfg)
 	mm_free(cfg);
 }
 
+
+int
+event_config_set_flag(struct event_config *cfg,
+    enum event_base_config_flag flag)
+{
+	if (!cfg)
+		return -1;
+	cfg->flags |= flag;
+	return 0;
+}
+
 int
 event_config_avoid_method(struct event_config *cfg, const char *method)
 {