1 files changed, 2 insertions, 1 deletions

diff --git a/src/microhttpd/mhd_send.c b/src/microhttpd/mhd_send.c
index a4c58516..3f3a1cdc 100644
--- a/src/microhttpd/mhd_send.c
+++ b/src/microhttpd/mhd_send.c
@@ -884,7 +884,8 @@ MHD_send_hdr_and_body_ (struct MHD_Connection *connection,
 
     if ( (header_size == (size_t) ret) &&
          ((size_t) SSIZE_MAX > header_size) &&
-         (0 != body_size) )
+         (0 != body_size) &&
+         (connection->sk_nonblck) )
     {
       ssize_t ret2;
       /* The header has been sent completely.