diff --git a/native-pkcs11-piv/src/piv/util.rs b/native-pkcs11-piv/src/piv/util.rs
index 9e42f4e..7f1ed27 100644
--- a/native-pkcs11-piv/src/piv/util.rs
+++ b/native-pkcs11-piv/src/piv/util.rs
@@ -1,3 +1,17 @@
+// Copyright 2024 Hatter Jiang
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 use p256::ecdsa::signature::digest::Digest;
 use p256::pkcs8::ObjectIdentifier;
 use sha1::Sha1;
diff --git a/native-pkcs11/Cargo.toml b/native-pkcs11/Cargo.toml
index c664476..3e197ca 100644
--- a/native-pkcs11/Cargo.toml
+++ b/native-pkcs11/Cargo.toml
@@ -8,9 +8,6 @@ rust-version.workspace = true
 repository.workspace = true
 license.workspace = true
 
-[features]
-custom-function-list = []
-
 [dependencies]
 cached = { version = "0.51.4", default-features = false }
 native-pkcs11-core = { version = "^0.2.14", path = "../native-pkcs11-core" }
diff --git a/native-pkcs11/src/lib.rs b/native-pkcs11/src/lib.rs
index a46e75b..d71462d 100644
--- a/native-pkcs11/src/lib.rs
+++ b/native-pkcs11/src/lib.rs
@@ -277,7 +277,6 @@ cryptoki_fn!(
     }
 );
 
-// #[cfg(not(feature = "custom-function-list"))]
 cryptoki_fn!(
     unsafe fn C_GetFunctionList(ppFunctionList: CK_FUNCTION_LIST_PTR_PTR) {
         not_null!(ppFunctionList);