diff --git a/src/rust/src/backend/ec.rs b/src/rust/src/backend/ec.rs
index 07a3ce6aac72..e221b025cbb9 100644
--- a/src/rust/src/backend/ec.rs
+++ b/src/rust/src/backend/ec.rs
@@ -65,11 +65,11 @@ fn curve_from_py_curve(
         "sect409k1" => openssl::nid::Nid::SECT409K1,
         "sect571k1" => openssl::nid::Nid::SECT571K1,
 
-        #[cfg(not(any(CRYPTOGRAPHY_IS_LIBRESSL, CRYPTOGRAPHY_IS_BORINGSSL)))]
+        #[cfg(not(CRYPTOGRAPHY_IS_BORINGSSL))]
         "brainpoolP256r1" => openssl::nid::Nid::BRAINPOOL_P256R1,
-        #[cfg(not(any(CRYPTOGRAPHY_IS_LIBRESSL, CRYPTOGRAPHY_IS_BORINGSSL)))]
+        #[cfg(not(CRYPTOGRAPHY_IS_BORINGSSL))]
         "brainpoolP384r1" => openssl::nid::Nid::BRAINPOOL_P384R1,
-        #[cfg(not(any(CRYPTOGRAPHY_IS_LIBRESSL, CRYPTOGRAPHY_IS_BORINGSSL)))]
+        #[cfg(not(CRYPTOGRAPHY_IS_BORINGSSL))]
         "brainpoolP512r1" => openssl::nid::Nid::BRAINPOOL_P512R1,
 
         _ => {