diff --git a/CHANGELOG.md b/CHANGELOG.md
index 613c965..ff511dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2017-05-18
+
+* Fix `HandleSentMessageBinary`.
+
 ## 2017-04-11
 
 * Allow any origin by default.
diff --git a/README.md b/README.md
index cdddf7e..67e3ab5 100644
--- a/README.md
+++ b/README.md
@@ -173,6 +173,7 @@ func main() {
 * Matt Caldwell (@mattcaldwell)
 * Heikki Uljas (@huljas)
 * Robbie Trencheny (@robbiet480)
+* yangjinecho (@yangjinecho)
 
 ## FAQ
 
diff --git a/melody.go b/melody.go
index 39cbd97..6e416b1 100644
--- a/melody.go
+++ b/melody.go
@@ -129,7 +129,7 @@ func (m *Melody) HandleSentMessage(fn func(*Session, []byte)) {
 
 // HandleSentMessageBinary fires fn when a binary message is successfully sent.
 func (m *Melody) HandleSentMessageBinary(fn func(*Session, []byte)) {
-	m.messageSentHandler = fn
+	m.messageSentHandlerBinary = fn
 }
 
 // HandleError fires fn when a session has an error.