diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 1fb59481b..bc58b0b91 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -2247,6 +2247,7 @@ void ERR_load_SSL_strings(void);
 # define SSL_R_ILLEGAL_SUITEB_DIGEST                      380
 # define SSL_R_INAPPROPRIATE_FALLBACK                     373
 # define SSL_R_INCONSISTENT_COMPRESSION                   340
+# define SSL_R_INCONSISTENT_EXTMS                         104
 # define SSL_R_INVALID_COMMAND                            280
 # define SSL_R_INVALID_COMPRESSION_ALGORITHM              341
 # define SSL_R_INVALID_NULL_CMD_NAME                      385
diff --git a/ssl/ssl_err.c b/ssl/ssl_err.c
index b5940284a..062310484 100644
--- a/ssl/ssl_err.c
+++ b/ssl/ssl_err.c
@@ -533,6 +533,7 @@ static ERR_STRING_DATA SSL_str_reasons[] = {
     {ERR_REASON(SSL_R_ILLEGAL_SUITEB_DIGEST), "illegal Suite B digest"},
     {ERR_REASON(SSL_R_INAPPROPRIATE_FALLBACK), "inappropriate fallback"},
     {ERR_REASON(SSL_R_INCONSISTENT_COMPRESSION), "inconsistent compression"},
+    {ERR_REASON(SSL_R_INCONSISTENT_EXTMS), "inconsistent extms"},
     {ERR_REASON(SSL_R_INVALID_COMMAND), "invalid command"},
     {ERR_REASON(SSL_R_INVALID_COMPRESSION_ALGORITHM),
      "invalid compression algorithm"},