diff --git a/crypto/pem/pem.h b/crypto/pem/pem.h
index 2cdad8ac26..de4ba3ee1d 100644
--- a/crypto/pem/pem.h
+++ b/crypto/pem/pem.h
@@ -588,6 +588,7 @@ void ERR_load_PEM_strings(void);
 # define PEM_R_ERROR_CONVERTING_PRIVATE_KEY               115
 # define PEM_R_EXPECTING_PRIVATE_KEY_BLOB                 119
 # define PEM_R_EXPECTING_PUBLIC_KEY_BLOB                  120
+# define PEM_R_HEADER_TOO_LONG                            128
 # define PEM_R_INCONSISTENT_HEADER                        121
 # define PEM_R_KEYBLOB_HEADER_PARSE_ERROR                 122
 # define PEM_R_KEYBLOB_TOO_SHORT                          123
diff --git a/crypto/pem/pem_err.c b/crypto/pem/pem_err.c
index 702c5adecb..f02de5c44a 100644
--- a/crypto/pem/pem_err.c
+++ b/crypto/pem/pem_err.c
@@ -1,6 +1,6 @@
 /* crypto/pem/pem_err.c */
 /* ====================================================================
- * Copyright (c) 1999-2007 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1999-2016 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -130,6 +130,7 @@ static ERR_STRING_DATA PEM_str_reasons[] = {
      "expecting private key blob"},
     {ERR_REASON(PEM_R_EXPECTING_PUBLIC_KEY_BLOB),
      "expecting public key blob"},
+    {ERR_REASON(PEM_R_HEADER_TOO_LONG), "header too long"},
     {ERR_REASON(PEM_R_INCONSISTENT_HEADER), "inconsistent header"},
     {ERR_REASON(PEM_R_KEYBLOB_HEADER_PARSE_ERROR),
      "keyblob header parse error"},