diff --git a/.gometalinter.json b/.gometalinter.json
index 42ba3bab..41a9f5ad 100644
--- a/.gometalinter.json
+++ b/.gometalinter.json
@@ -10,6 +10,7 @@
     "goimports",
     "ineffassign",
     "misspell",
+    "structcheck",
     "varcheck",
     "vet"
   ],
diff --git a/internal/handshake/crypto_setup_server_test.go b/internal/handshake/crypto_setup_server_test.go
index 9c855c0a..c314462f 100644
--- a/internal/handshake/crypto_setup_server_test.go
+++ b/internal/handshake/crypto_setup_server_test.go
@@ -96,7 +96,6 @@ func (s *mockStream) close() {
 }
 
 type mockCookieProtector struct {
-	data      []byte
 	decodeErr error
 }
 
diff --git a/server_tls.go b/server_tls.go
index f38b90cd..14c780f3 100644
--- a/server_tls.go
+++ b/server_tls.go
@@ -36,7 +36,6 @@ type serverTLS struct {
 	config            *Config
 	supportedVersions []protocol.VersionNumber
 	mintConf          *mint.Config
-	cookieProtector   mint.CookieProtector
 	params            *handshake.TransportParameters
 	newMintConn       func(*handshake.CryptoStreamConn, protocol.VersionNumber) (handshake.MintTLS, <-chan handshake.TransportParameters, error)