diff --git a/3rdparty/openssl/crypto/rsa/rsa_gen.c b/3rdparty/openssl/crypto/rsa/rsa_gen.c
index 082c8da2..98d8129a 100644
--- a/3rdparty/openssl/crypto/rsa/rsa_gen.c
+++ b/3rdparty/openssl/crypto/rsa/rsa_gen.c
@@ -145,6 +145,10 @@ static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value,
     if (BN_copy(rsa->e, e_value) == NULL)
         goto err;
 
+    BN_set_flags(rsa->p, BN_FLG_CONSTTIME);
+    BN_set_flags(rsa->q, BN_FLG_CONSTTIME);
+    BN_set_flags(r2, BN_FLG_CONSTTIME);
+    
     /* generate p and q */
     for (;;) {
         if (!BN_generate_prime_ex(rsa->p, bitsp, 0, NULL, NULL, cb))