diff --git a/openssl/src/ssl/mod.rs b/openssl/src/ssl/mod.rs
index fc414a2ff..e15c48b6d 100644
--- a/openssl/src/ssl/mod.rs
+++ b/openssl/src/ssl/mod.rs
@@ -709,7 +709,7 @@ cfg_if! {
 ///
 /// [`SslContextBuilder::set_alpn_protos`]: struct.SslContextBuilder.html#method.set_alpn_protos
 #[corresponds(SSL_select_next_proto)]
-pub fn select_next_proto<'a>(server: &[u8], client: &'a [u8]) -> Option<&'a [u8]> {
+pub fn select_next_proto<'a>(server: &'a [u8], client: &'a [u8]) -> Option<&'a [u8]> {
     unsafe {
         let mut out = ptr::null_mut();
         let mut outlen = 0;