diff --git a/openssl/src/pkcs12.rs b/openssl/src/pkcs12.rs
index 6d7e8ba7..8c884e7f 100644
--- a/openssl/src/pkcs12.rs
+++ b/openssl/src/pkcs12.rs
@@ -49,7 +49,7 @@ impl Pkcs12 {
 
             let pkey = PKey::from_ptr(pkey);
             let cert = X509::from_ptr(cert);
-            let chain = Stack::from_ptr(chain).into_iter().collect();
+            let chain = Stack::from_ptr(chain);
 
             Ok(ParsedPkcs12 {
                 pkey: pkey,
@@ -63,7 +63,7 @@ impl Pkcs12 {
 pub struct ParsedPkcs12 {
     pub pkey: PKey,
     pub cert: X509,
-    pub chain: Vec<X509>,
+    pub chain: Stack<X509>,
 }
 
 #[cfg(test)]
diff --git a/openssl/src/x509/mod.rs b/openssl/src/x509/mod.rs
index ec17cbe2..eb517f80 100644
--- a/openssl/src/x509/mod.rs
+++ b/openssl/src/x509/mod.rs
@@ -480,6 +480,12 @@ impl AsRef<X509Ref> for X509 {
     }
 }
 
+impl AsRef<X509Ref> for X509Ref {
+    fn as_ref(&self) -> &X509Ref {
+        self
+    }
+}
+
 impl Borrow<X509Ref> for X509 {
     fn borrow(&self) -> &X509Ref {
         &*self