diff --git a/src/http/modules/ngx_http_mp4_module.c b/src/http/modules/ngx_http_mp4_module.c
index 9213846..c5997c5 100644
--- a/src/http/modules/ngx_http_mp4_module.c
+++ b/src/http/modules/ngx_http_mp4_module.c
@@ -410,6 +410,7 @@
     ngx_memzero(&of, sizeof(ngx_open_file_info_t));
 
     of.read_ahead = clcf->read_ahead;
+    of.directio = NGX_MAX_OFF_T_VALUE;
     of.valid = clcf->open_file_cache_valid;
     of.min_uses = clcf->open_file_cache_min_uses;
     of.errors = clcf->open_file_cache_errors;
@@ -534,6 +535,8 @@
                           ngx_directio_on_n " \"%s\" failed", path.data);
         }
 
+        of.is_directio = 1;
+
         if (mp4) {
             mp4->file.directio = 1;
         }