diff --git a/src/bn.rs b/src/bn.rs
index 1cd00dd..dbd7ae9 100644
--- a/src/bn.rs
+++ b/src/bn.rs
@@ -814,7 +814,7 @@ impl BigNumRef {
     /// assert_eq!(&bn_vec, &[0, 0, 0x45, 0x43]);
     /// ```
     #[corresponds(BN_bn2binpad)]
-    #[cfg(ossl110)]
+    #[cfg(any(boringssl, ossl110))]
     pub fn to_vec_padded(&self, pad_to: i32) -> Result<Vec<u8>, ErrorStack> {
         let mut v = Vec::with_capacity(pad_to as usize);
         unsafe {