diff --git a/openssl-sys/src/ssl.rs b/openssl-sys/src/ssl.rs
index 12243dc4fcb56b9ac3c4d1dbd4d59d524ba9ff88..d3f09738c6389d91c664ef7a8b74b1627512dc32 100644
--- a/openssl-sys/src/ssl.rs
+++ b/openssl-sys/src/ssl.rs
@@ -339,6 +339,8 @@ pub const SSL_CTRL_SET_TLSEXT_STATUS_REQ_OCSP_RESP: c_int = 71;
 #[cfg(any(libressl, all(ossl101, not(ossl110))))]
 pub const SSL_CTRL_CLEAR_OPTIONS: c_int = 77;
 pub const SSL_CTRL_GET_EXTRA_CHAIN_CERTS: c_int = 82;
+#[cfg(ossl102)]
+pub const SSL_CTRL_CHAIN_CERT: c_int = 89;
 #[cfg(any(ossl111, libressl252))]
 pub const SSL_CTRL_SET_GROUPS_LIST: c_int = 92;
 #[cfg(any(libressl, all(ossl102, not(ossl110))))]
@@ -406,6 +408,10 @@ cfg_if! {
         }
     }
 }
+#[cfg(ossl102)]
+pub unsafe fn SSL_add_chain_certificate_pem(ssl: *mut ::SSL, ptr: *mut c_void) -> c_long {
+    SSL_ctrl(ssl, SSL_CTRL_CHAIN_CERT, 1, ptr)
+}
 
 #[cfg(ossl102)]
 pub unsafe fn SSL_CTX_set1_sigalgs_list(ctx: *mut SSL_CTX, s: *const c_char) -> c_long {
diff --git a/openssl/src/ssl/mod.rs b/openssl/src/ssl/mod.rs
index 4f349a4e4bc3167d1f90c8ac61d198dac03d39b6..ec960fa107745fd2c919082142249bacd00600f1 100644
--- a/openssl/src/ssl/mod.rs
+++ b/openssl/src/ssl/mod.rs
@@ -3104,6 +3104,19 @@ impl SslRef {
             }
         }
     }
+    #[corresponds(SSL_add1_chain_cert)]
+    #[cfg(ossl102)]
+    pub fn add_chain_certificate_pem(&mut self, chain: &[u8]) -> Result<(), ErrorStack> {
+        let cert = X509::from_pem(chain)?;
+        let ret = unsafe {
+            ffi::SSL_add_chain_certificate_pem(self.as_ptr(), cert.as_ptr() as *mut _ as *mut _)
+        };
+        if ret == 1 {
+            Ok(())
+        }else {
+            Err(ErrorStack::get())
+        }
+    }
 }
 
 /// An SSL stream midway through the handshake process.