diff --git a/cmd/backend/backend.go b/cmd/backend/backend.go
index abcf17f..ff6e5e4 100644
--- a/cmd/backend/backend.go
+++ b/cmd/backend/backend.go
@@ -52,7 +52,7 @@ func receiveMessages(d amqp.Delivery) bool {
 }
 
 // publishInput reads user input, marshals to json, and publishes to
-// a Rabbit exchange with the front-end and database routing key.
+// a Rabbit exchange with the front-end and database routing keys.
 func publishInput(conn *rabbit.Conn) {
 	reader := bufio.NewReader(os.Stdin)
 
diff --git a/cmd/server/server.go b/cmd/server/server.go
index 17f4cd7..a99d2ed 100644
--- a/cmd/server/server.go
+++ b/cmd/server/server.go
@@ -124,7 +124,7 @@ func handleWriteWebsocket(ws *websocket.Conn) func(d amqp.Delivery) error {
 }
 
 // handlePublishRabbit publishes a Websocket message to a Rabbit
-// exchange with the the back-end and database routing key.
+// exchange with the the back-end and database routing keys.
 // A Websocket reader only passes a message. So, a Rabbit channel is
 // additionally passed using a closure.
 func handlePublishRabbit(ch *amqp.Channel) func(msg []byte) error {