diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c

index 0aaea47..fd6ecb0 100644

--- a/src/http/v2/ngx_http_v2.c

+++ b/src/http/v2/ngx_http_v2.c

@@ -1549,6 +1549,14 @@ ngx_http_v2_state_process_header(ngx_http_v2_connection_t *h2c, u_char *pos,

         header->name.len = h2c->state.field_end - h2c->state.field_start;

         header->name.data = h2c->state.field_start;

+        if (header->name.len == 0) {

+            ngx_log_error(NGX_LOG_INFO, h2c->connection->log, 0,

+                          "client sent zero header name length");

+

+            return ngx_http_v2_connection_error(h2c,

+                                                NGX_HTTP_V2_PROTOCOL_ERROR);

+        }

+

         return ngx_http_v2_state_field_len(h2c, pos, end);

     }

@@ -3259,10 +3267,6 @@ ngx_http_v2_validate_header(ngx_http_request_t *r, ngx_http_v2_header_t *header)

     ngx_uint_t                 i;

     ngx_http_core_srv_conf_t  *cscf;

-    if (header->name.len == 0) {

-        return NGX_ERROR;

-    }

-

     r->invalid_header = 0;

     cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);