diff --git a/third_party/boringssl/src/crypto/internal.h b/third_party/boringssl/src/crypto/internal.h
index 762eaae8c..27652fbe9 100644
--- a/third_party/boringssl/src/crypto/internal.h
+++ b/third_party/boringssl/src/crypto/internal.h
@@ -1201,7 +1201,7 @@ static inline uint64_t CRYPTO_rotr_u64(uint64_t value, int shift) {

 // CRYPTO_addc_* returns |x + y + carry|, and sets |*out_carry| to the carry
 // bit. |carry| must be zero or one.
-#if OPENSSL_HAS_BUILTIN(__builtin_addc)
+#if OPENSSL_HAS_BUILTIN(__builtin_addc) && !defined(__cplusplus)

 #define CRYPTO_GENERIC_ADDC(x, y, carry, out_carry) \
   (_Generic((x),                                    \
@@ -1253,7 +1253,7 @@ static inline uint64_t CRYPTO_addc_u64(uint64_t x, uint64_t y, uint64_t carry,

 // CRYPTO_subc_* returns |x - y - borrow|, and sets |*out_borrow| to the borrow
 // bit. |borrow| must be zero or one.
-#if OPENSSL_HAS_BUILTIN(__builtin_subc)
+#if OPENSSL_HAS_BUILTIN(__builtin_subc) && !defined(__cplusplus)

 #define CRYPTO_GENERIC_SUBC(x, y, borrow, out_borrow) \
   (_Generic((x),                                      \