diff --git a/ssl/ssl_cipher.c b/ssl/ssl_cipher.c
index 965c3c6..e5b9790 100644
--- a/ssl/ssl_cipher.c
+++ b/ssl/ssl_cipher.c
@@ -1525,6 +1525,10 @@
   return (cipher->algorithm_mkey & SSL_kECDHE) != 0;
 }
 
+int SSL_CIPHER_is_static_RSA(const SSL_CIPHER *cipher) {
+  return (cipher->algorithm_mkey & SSL_kRSA) != 0;
+}
+
 uint16_t SSL_CIPHER_get_min_version(const SSL_CIPHER *cipher) {
   if (cipher->algorithm_mkey == SSL_kGENERIC ||
       cipher->algorithm_auth == SSL_aGENERIC) {