diff --git a/lib/jwt/eddsa/jwk/okp.rb b/lib/jwt/eddsa/jwk/okp.rb
index ea17a84..35af1ae 100644
--- a/lib/jwt/eddsa/jwk/okp.rb
+++ b/lib/jwt/eddsa/jwk/okp.rb
@@ -7,7 +7,7 @@ module JWK
       class OKP < ::JWT::JWK::KeyBase
         KTY  = "OKP"
         KTYS = [KTY, JWT::EdDSA::JWK::OKP, Ed25519::SigningKey, Ed25519::VerifyKey].freeze
-        OKP_PUBLIC_KEY_ELEMENTS = %i[kty n x].freeze
+        OKP_PUBLIC_KEY_ELEMENTS = %i[crv kty x].freeze
         OKP_PRIVATE_KEY_ELEMENTS = %i[d].freeze
 
         def initialize(key, params = nil, options = {})
diff --git a/spec/jwt/jwk/okp_spec.rb b/spec/jwt/jwk/okp_spec.rb
index 0aa438b..be2adb7 100644
--- a/spec/jwt/jwk/okp_spec.rb
+++ b/spec/jwt/jwk/okp_spec.rb
@@ -73,6 +73,16 @@
     end
   end
 
+  describe "#kid" do
+    # Test vector from RFC 8037 Appendix A.3 (JWK Thumbprint Canonicalization):
+    # https://www.rfc-editor.org/rfc/rfc8037#appendix-A.3
+    let(:key) { { kty: "OKP", crv: "Ed25519", x: "11qYAYKxCrfVS_7TyWQHOg7hcvPapiMlrwIaaPcHURo" } }
+
+    it "matches the RFC 7638 JWK thumbprint of the crv/kty/x members" do
+      expect(instance.kid).to eq("kPrK_qmxVWaYVA9wwBF6Iuo3vVzz7TxHCTwXBygrS4k")
+    end
+  end
+
   describe "#export" do
     let(:options) { {} }
     subject { instance.export(options) }