diff --git a/docs/libcurl/symbols-in-versions b/docs/libcurl/symbols-in-versions
index bbd629d..bacf527 100644
--- a/docs/libcurl/symbols-in-versions
+++ b/docs/libcurl/symbols-in-versions
@@ -123,7 +123,6 @@ CURLE_TFTP_NOSUCHUSER           7.15.0
 CURLE_TFTP_NOTFOUND             7.15.0
 CURLE_TFTP_PERM                 7.15.0
 CURLE_TFTP_UNKNOWNID            7.15.0
-CURLE_TLSAUTH_FAILED            7.21.4
 CURLE_TOO_MANY_REDIRECTS        7.5
 CURLE_UNKNOWN_TELNET_OPTION     7.7
 CURLE_UNSUPPORTED_PROTOCOL      7.1
diff --git a/include/curl/curl.h b/include/curl/curl.h
index bf65420..4744f48 100644
--- a/include/curl/curl.h
+++ b/include/curl/curl.h
@@ -502,7 +502,6 @@ typedef enum {
   CURLE_RTSP_SESSION_ERROR,      /* 86 - mismatch of RTSP Session Identifiers */
   CURLE_FTP_BAD_FILE_LIST,       /* 87 - unable to parse FTP file list */
   CURLE_CHUNK_FAILED,            /* 88 - chunk callback reported error */
-  CURLE_TLSAUTH_FAILED,          /* 89 - Failed TLS authentication */
 
   CURL_LAST /* never use! */
 } CURLcode;
diff --git a/lib/gtls.c b/lib/gtls.c
index b5ef8fb..a60e717 100644
--- a/lib/gtls.c
+++ b/lib/gtls.c
@@ -355,7 +355,7 @@ gtls_connect_step1(struct connectdata *conn,
     if(rc != GNUTLS_E_SUCCESS) {
       failf(data, "gnutls_srp_allocate_client_cred() failed: %s",
             gnutls_strerror(rc));
-      return CURLE_TLSAUTH_FAILED;
+      return CURLE_OUT_OF_MEMORY;
     }
 
     rc = gnutls_srp_set_client_credentials(conn->ssl[sockindex].srp_client_cred,
@@ -364,7 +364,7 @@ gtls_connect_step1(struct connectdata *conn,
     if(rc != GNUTLS_E_SUCCESS) {
       failf(data, "gnutls_srp_set_client_cred() failed: %s",
             gnutls_strerror(rc));
-      return CURLE_TLSAUTH_FAILED;
+      return CURLE_BAD_FUNCTION_ARGUMENT;
     }
   }
 #endif
diff --git a/lib/strerror.c b/lib/strerror.c
index 6b67a87..a88cdc4 100644
--- a/lib/strerror.c
+++ b/lib/strerror.c
@@ -281,9 +281,6 @@ curl_easy_strerror(CURLcode error)
   case CURLE_CHUNK_FAILED:
     return "Chunk callback failed";
 
-  case CURLE_TLSAUTH_FAILED:
-    return "TLS Authentication failed";
-
     /* error codes not used by current libcurl */
   case CURLE_OBSOLETE4:
   case CURLE_OBSOLETE10: