the flags should be bit-wide only
diff --git a/src/core/ngx_buf.h b/src/core/ngx_buf.h
index 8649bdb..56e0399 100644
--- a/src/core/ngx_buf.h
+++ b/src/core/ngx_buf.h
@@ -75,13 +75,13 @@
ngx_chain_t *free;
ngx_chain_t *busy;
- unsigned sendfile;
- unsigned directio;
+ unsigned sendfile:1;
+ unsigned directio:1;
#if (NGX_HAVE_ALIGNED_DIRECTIO)
- unsigned unaligned;
+ unsigned unaligned:1;
#endif
- unsigned need_in_memory;
- unsigned need_in_temp;
+ unsigned need_in_memory:1;
+ unsigned need_in_temp:1;
ngx_pool_t *pool;
ngx_int_t allocated;