diff --git a/boring/src/ssl/test/mod.rs b/boring/src/ssl/test/mod.rs
index 9317a7ba..3cdc5ed2 100644
--- a/boring/src/ssl/test/mod.rs
+++ b/boring/src/ssl/test/mod.rs
@@ -317,13 +317,13 @@ fn test_mutable_store() {
     let cert2 = X509::from_pem(cert2).unwrap();
 
     let mut ctx = SslContext::builder(SslMethod::tls()).unwrap();
-    ctx.cert_store_mut().add_cert(&cert.clone()).unwrap();
+    ctx.cert_store_mut().add_cert(cert.clone()).unwrap();
     assert_eq!(1, ctx.cert_store().objects_len());
 
     ctx.set_cert_store_builder(X509StoreBuilder::new().unwrap());
     assert_eq!(0, ctx.cert_store().objects_len());
 
-    ctx.cert_store_mut().add_cert(&cert.clone()).unwrap();
+    ctx.cert_store_mut().add_cert(cert.clone()).unwrap();
     assert_eq!(1, ctx.cert_store().objects_len());
 
     let mut new_store = X509StoreBuilder::new().unwrap();
diff --git a/boring/src/x509/store.rs b/boring/src/x509/store.rs
index 7b9a2317..95aedda4 100644
--- a/boring/src/x509/store.rs
+++ b/boring/src/x509/store.rs
@@ -80,7 +80,8 @@ impl X509StoreBuilder {
 impl X509StoreBuilderRef {
     /// Adds a certificate to the certificate store.
     #[corresponds(X509_STORE_add_cert)]
-    pub fn add_cert(&mut self, cert: &X509Ref) -> Result<(), ErrorStack> {
+    pub fn add_cert(&mut self, cert: impl AsRef<X509Ref>) -> Result<(), ErrorStack> {
+        let cert = cert.as_ref();
         unsafe { cvt(ffi::X509_STORE_add_cert(self.as_ptr(), cert.as_ptr())) }
     }