diff --git a/internal/tunnel/proto/msg.go b/internal/tunnel/proto/msg.go
index 55db443..9484621 100644
--- a/internal/tunnel/proto/msg.go
+++ b/internal/tunnel/proto/msg.go
@@ -204,7 +204,7 @@ type Bind struct {
 	ClientID      string    `json:"Id"` // a session-unique bind ID generated by the client, if empty, one is generated
 	Proto         string    // the protocol to bind (one of 'http', 'https', 'tcp', 'tls', 'ssh')
 	ForwardsTo    string    // the address of the upstream service the ngrok agent will forward to
-	ForwardsProto string    // the L7 protocol the upstream service is expecting (one of '', 'h1', 'h2c')
+	ForwardsProto string    // the L7 protocol the upstream service is expecting (one of '', 'http1', 'http2')
 	Opts          any       // options for the bind - protocol dependent
 	Extra         BindExtra // anything extra the application wants to send
 }
@@ -236,7 +236,7 @@ type StartTunnelWithLabel struct {
 	// ID       string            `json:"-"` // a session-unique bind ID generated by the client, if empty, one is generated
 	Labels        map[string]string // labels for tunnel group membership
 	ForwardsTo    string            // the address of the upstream service the ngrok agent will forward to
-	ForwardsProto string            // the L7 protocol the upstream service is expecting (one of '', 'h1', 'h2c')
+	ForwardsProto string            // the L7 protocol the upstream service is expecting (one of '', 'http1', 'http2')
 	Metadata      string
 }