diff --git a/src/microhttpd/gen_auth.c b/src/microhttpd/gen_auth.c
index 0246a114..d5353863 100644
--- a/src/microhttpd/gen_auth.c
+++ b/src/microhttpd/gen_auth.c
@@ -480,7 +480,7 @@ parse_auth_rq_header_ (struct MHD_Connection *c)
   if (NULL != rq_auth)
   {
     memset (rq_auth, 0, sizeof(struct MHD_AuthRqHeader));
-    rq_auth->auth_type = MHD_AUTHTYPE_INVALID;
+    rq_auth->auth_type = MHD_AUTHTYPE_UNKNOWN;
   }
   return false;
 }
diff --git a/src/microhttpd/gen_auth.h b/src/microhttpd/gen_auth.h
index 6be4eb4d..f6d207e5 100644
--- a/src/microhttpd/gen_auth.h
+++ b/src/microhttpd/gen_auth.h
@@ -41,7 +41,8 @@ enum MHD_AuthType
   MHD_AUTHTYPE_NONE = 0,/**< No authorisation */
   MHD_AUTHTYPE_BASIC,   /**< Basic Authorisation, RFC 7617  */
   MHD_AUTHTYPE_DIGEST,  /**< Digest Authorisation, RFC 7616 */
-  MHD_AUTHTYPE_INVALID  /**< Wrong/Unknown/Unsupported authorisation type */
+  MHD_AUTHTYPE_UNKNOWN, /**< Unknown/Unsupported authorisation type */
+  MHD_AUTHTYPE_INVALID  /**< Wrong/broken authorisation header */
 };
 
 #ifdef BAUTH_SUPPORT