diff --git a/ssl/ssl_privkey.cc b/ssl/ssl_privkey.cc
index da037d7..e9990af 100644
--- a/ssl/ssl_privkey.cc
+++ b/ssl/ssl_privkey.cc
@@ -441,6 +441,8 @@
 const char *SSL_get_signature_algorithm_name(uint16_t sigalg,
                                              int include_curve) {
   switch (sigalg) {
+    case SSL_SIGN_RSA_PKCS1_MD5_SHA1:
+      return "rsa_pkcs1_md5_sha1";
     case SSL_SIGN_RSA_PKCS1_SHA1:
       return "rsa_pkcs1_sha1";
     case SSL_SIGN_RSA_PKCS1_SHA256: