diff --git a/examples/chat/conn.go b/examples/chat/conn.go
index 916bada..7cc0496 100644
--- a/examples/chat/conn.go
+++ b/examples/chat/conn.go
@@ -88,7 +88,7 @@ func (c *connection) writePump() {
 	}
 }
 
-// serverWs handles webocket requests from the peer.
+// serverWs handles websocket requests from the peer.
 func serveWs(w http.ResponseWriter, r *http.Request) {
 	if r.Method != "GET" {
 		http.Error(w, "Method not allowed", 405)
diff --git a/json.go b/json.go
index ce8f00c..e0668f2 100644
--- a/json.go
+++ b/json.go
@@ -38,7 +38,7 @@ func ReadJSON(c *Conn, v interface{}) error {
 // ReadJSON reads the next JSON-encoded message from the connection and stores
 // it in the value pointed to by v.
 //
-// See the documentation for the encoding/json Marshal function for details
+// See the documentation for the encoding/json Unmarshal function for details
 // about the conversion of JSON to a Go value.
 func (c *Conn) ReadJSON(v interface{}) error {
 	_, r, err := c.NextReader()
diff --git a/server.go b/server.go
index 4de5bb0..c24c410 100644
--- a/server.go
+++ b/server.go
@@ -137,6 +137,9 @@ func (u *Upgrader) Upgrade(w http.ResponseWriter, r *http.Request, responseHeade
 	}
 	var rw *bufio.ReadWriter
 	netConn, rw, err = h.Hijack()
+	if err != nil {
+		return u.returnError(w, r, http.StatusInternalServerError, err.Error())
+	}
 	br = rw.Reader
 
 	if br.Buffered() > 0 {