diff --git a/openssl-sys/src/lib.rs b/openssl-sys/src/lib.rs
index dec39b1b25d7057ee536d68c4ed804ca2c809f40..3a92a8d45a43e81f7169760962066478f11f1eea 100755
--- a/openssl-sys/src/lib.rs
+++ b/openssl-sys/src/lib.rs
@@ -415,6 +415,7 @@ extern "C" {
     pub fn SSL_get_ex_data_X509_STORE_CTX_idx() -> c_int;
     pub fn SSL_get_SSL_CTX(ssl: *mut SSL) -> *mut SSL_CTX;
     pub fn SSL_get_current_compression(ssl: *mut SSL) -> *const COMP_METHOD;
+    pub fn SSL_get_peer_certificate(ssl: *mut SSL) -> *mut X509;
 
     pub fn SSL_COMP_get_name(comp: *const COMP_METHOD) -> *const c_char;