diff --git a/mux/mux.go b/mux/mux.go
index 63d83b4992e5d936f67caaa7273ca38639be3a37..e91f8a95ec68e733661899760e945504ce13faa8 100644
--- a/mux/mux.go
+++ b/mux/mux.go
@@ -37,8 +37,8 @@ type MuxedStream interface {
 	// Reset.
 	CloseWrite() error
 
-	// CloseRead closes the stream for writing but leaves it open for
-	// reading.
+	// CloseRead closes the stream for reading but leaves it open for
+	// writing.
 	//
 	// CloseRead does not free the stream, users must still call Close or
 	// Reset.