diff --git a/src/core/ngx_buf.c b/src/core/ngx_buf.c
index d30a0a4..1862a06 100644
--- a/src/core/ngx_buf.c
+++ b/src/core/ngx_buf.c
@@ -246,6 +246,9 @@
             if (aligned <= cl->buf->file_last) {
                 size = aligned - cl->buf->file_pos;
             }
+
+            total += size;
+            break;
         }
 
         total += size;
diff --git a/src/os/unix/ngx_darwin_sendfile_chain.c b/src/os/unix/ngx_darwin_sendfile_chain.c
index c802e9f..2a76c15 100644
--- a/src/os/unix/ngx_darwin_sendfile_chain.c
+++ b/src/os/unix/ngx_darwin_sendfile_chain.c
@@ -98,7 +98,7 @@
 
             send += file_size;
 
-            if (header.count == 0) {
+            if (header.count == 0 && send < limit) {
 
                 /*
                  * create the trailer iovec and coalesce the neighbouring bufs
diff --git a/src/os/unix/ngx_freebsd_sendfile_chain.c b/src/os/unix/ngx_freebsd_sendfile_chain.c
index d0299f5..4822e72 100644
--- a/src/os/unix/ngx_freebsd_sendfile_chain.c
+++ b/src/os/unix/ngx_freebsd_sendfile_chain.c
@@ -114,16 +114,24 @@
 
             send += file_size;
 
-            /* create the trailer iovec and coalesce the neighbouring bufs */
+            if (send < limit) {
 
-            cl = ngx_output_chain_to_iovec(&trailer, cl, limit - send, c->log);
+                /*
+                 * create the trailer iovec and coalesce the neighbouring bufs
+                 */
 
-            if (cl == NGX_CHAIN_ERROR) {
-                return NGX_CHAIN_ERROR;
+                cl = ngx_output_chain_to_iovec(&trailer, cl, limit - send,
+                                               c->log);
+                if (cl == NGX_CHAIN_ERROR) {
+                    return NGX_CHAIN_ERROR;
+                }
+
+                send += trailer.size;
+
+            } else {
+                trailer.count = 0;
             }
 
-            send += trailer.size;
-
             if (ngx_freebsd_use_tcp_nopush
                 && c->tcp_nopush == NGX_TCP_NOPUSH_UNSET)
             {