diff --git a/crypto/err/openssl.txt b/crypto/err/openssl.txt
index 1b4fca9b97..1fa0df36b1 100644
--- a/crypto/err/openssl.txt
+++ b/crypto/err/openssl.txt
@@ -2668,6 +2668,7 @@ KDF_R_VALUE_MISSING:102:value missing
 KDF_R_WRONG_OUTPUT_BUFFER_SIZE:112:wrong output buffer size
 OBJ_R_OID_EXISTS:102:oid exists
 OBJ_R_UNKNOWN_NID:101:unknown nid
+OBJ_R_UNKNOWN_OBJECT_NAME:103:unknown object name
 OCSP_R_CERTIFICATE_VERIFY_ERROR:101:certificate verify error
 OCSP_R_DIGEST_ERR:102:digest err
 OCSP_R_ERROR_IN_NEXTUPDATE_FIELD:122:error in nextupdate field
diff --git a/crypto/objects/obj_dat.c b/crypto/objects/obj_dat.c
index 0c4ec985cb..b2fd4a0226 100644
--- a/crypto/objects/obj_dat.c
+++ b/crypto/objects/obj_dat.c
@@ -372,6 +372,10 @@ ASN1_OBJECT *OBJ_txt2obj(const char *s, int no_name)
         if (((nid = OBJ_sn2nid(s)) != NID_undef) ||
             ((nid = OBJ_ln2nid(s)) != NID_undef))
             return OBJ_nid2obj(nid);
+        if (!ossl_isdigit(*s)) {
+            OBJerr(OBJ_F_OBJ_TXT2OBJ, OBJ_R_UNKNOWN_OBJECT_NAME);
+            return NULL;
+        }
     }
 
     /* Work out size of content octets */
diff --git a/crypto/objects/obj_err.c b/crypto/objects/obj_err.c
index b32e9f6f55..c55e8ef2d0 100644
--- a/crypto/objects/obj_err.c
+++ b/crypto/objects/obj_err.c
@@ -1,6 +1,6 @@
 /*
  * Generated by util/mkerr.pl DO NOT EDIT
- * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -16,6 +16,8 @@
 static const ERR_STRING_DATA OBJ_str_reasons[] = {
     {ERR_PACK(ERR_LIB_OBJ, 0, OBJ_R_OID_EXISTS), "oid exists"},
     {ERR_PACK(ERR_LIB_OBJ, 0, OBJ_R_UNKNOWN_NID), "unknown nid"},
+    {ERR_PACK(ERR_LIB_OBJ, 0, OBJ_R_UNKNOWN_OBJECT_NAME),
+    "unknown object name"},
     {0, NULL}
 };
 
diff --git a/include/openssl/objectserr.h b/include/openssl/objectserr.h
index 3cac9a7327..f1de77945b 100644
--- a/include/openssl/objectserr.h
+++ b/include/openssl/objectserr.h
@@ -8,8 +8,8 @@
  * https://www.openssl.org/source/license.html
  */
 
-#ifndef OPENSSL_OBJECTSERR_H
-# define OPENSSL_OBJECTSERR_H
+#ifndef OPENSSL_OBJERR_H
+# define OPENSSL_OBJERR_H
 # pragma once
 
 # include <openssl/opensslconf.h>
@@ -41,5 +41,6 @@ int ERR_load_OBJ_strings(void);
  */
 # define OBJ_R_OID_EXISTS                                 102
 # define OBJ_R_UNKNOWN_NID                                101
+# define OBJ_R_UNKNOWN_OBJECT_NAME                        103
 
 #endif