diff --git a/ssl/ssl_cipher.c b/ssl/ssl_cipher.c
index 0754da0..b23d775 100644
--- a/ssl/ssl_cipher.c
+++ b/ssl/ssl_cipher.c
@@ -448,6 +448,7 @@
      SSL_HANDSHAKE_MAC_DEFAULT, 256, 256,
     },
 
+#if !defined(BORINGSSL_ANDROID_SYSTEM)
     /* ChaCha20-Poly1305 cipher suites. */
 
     {
@@ -465,6 +466,7 @@
      SSL_HANDSHAKE_MAC_SHA256,
      256, 256,
     },
+#endif
 };
 
 static const size_t kCiphersLen = sizeof(kCiphers) / sizeof(kCiphers[0]);
@@ -609,10 +611,12 @@
       *out_fixed_iv_len = 4;
       return 1;
 
+#if !defined(BORINGSSL_ANDROID_SYSTEM)
     case SSL_CHACHA20POLY1305:
       *out_aead = EVP_aead_chacha20_poly1305();
       *out_fixed_iv_len = 0;
       return 1;
+#endif
 
     case SSL_RC4:
       switch (cipher->algorithm_mac) {
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index caa0cc4..f30e8eb 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -352,6 +352,9 @@
 static const uint16_t eccurves_default[] = {
     23, /* X9_62_prime256v1 */
     24, /* secp384r1 */
+#if defined(BORINGSSL_ANDROID_SYSTEM)
+    25, /* secp521r1 */
+#endif
 };
 
 int tls1_ec_curve_id2nid(uint16_t curve_id) {