diff --git a/build.rs b/build.rs
index eb6e0fc..8a55725 100644
--- a/build.rs
+++ b/build.rs
@@ -34,6 +34,7 @@ fn main() {
     let bindings_level2 = bindgen::Builder::default()
         .header(headers_path_str)
         .clang_arg("-DMLKEM_K=2")
+        .blocklist_function("PQCP_MLKEM_NATIVE_MLKEM512_keypair|PQCP_MLKEM_NATIVE_MLKEM512_enc")
         .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
         .generate()
         .expect("Unable to generate bindings");
@@ -41,6 +42,7 @@ fn main() {
     let bindings_level3 = bindgen::Builder::default()
         .header(headers_path_str)
         .clang_arg("-DMLKEM_K=3")
+        .blocklist_function("PQCP_MLKEM_NATIVE_MLKEM768_keypair|PQCP_MLKEM_NATIVE_MLKEM768_enc")
         .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
         .generate()
         .expect("Unable to generate bindings");
@@ -48,6 +50,7 @@ fn main() {
     let bindings_level4 = bindgen::Builder::default()
         .header(headers_path_str)
         .clang_arg("-DMLKEM_K=4")
+        .blocklist_function("PQCP_MLKEM_NATIVE_MLKEM1024_keypair|PQCP_MLKEM_NATIVE_MLKEM1024_enc")
         .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
         .generate()
         .expect("Unable to generate bindings");