diff --git a/src/crypto/tls/common.go b/src/crypto/tls/common.go
index 77957ef82bd..d561e61707e 100644
--- a/src/crypto/tls/common.go
+++ b/src/crypto/tls/common.go
@@ -619,7 +619,7 @@ type Config struct {
 	// protocol will be one from this list, and the connection will fail
 	// if there is no mutually supported protocol. If NextProtos is empty
 	// or the peer doesn't support ALPN, the connection will succeed and
-	// ConnectionState.NegotiatedProtocol will be empty."
+	// ConnectionState.NegotiatedProtocol will be empty.
 	NextProtos []string
 
 	// ServerName is used to verify the hostname on the returned