1 files changed, 6 insertions, 0 deletions

diff --git a/src/libirecovery.c b/src/libirecovery.c
index 5b70c08..6741b95 100644
--- a/src/libirecovery.c
+++ b/src/libirecovery.c
@@ -2868,6 +2868,12 @@ irecv_error_t irecv_send_buffer(irecv_client_t client, unsigned char* buffer, un
                 }
         }
 
+        if (recovery_mode && length % 512 == 0) {
+                /* send a ZLP */
+                bytes = 0;
+                irecv_usb_bulk_transfer(client, 0x04, buffer, 0, &bytes, USB_TIMEOUT);
+        }
+
         if (dfu_notify_finished && !recovery_mode) {
                 irecv_usb_control_transfer(client, 0x21, 1, packets, 0, (unsigned char*) buffer, 0, USB_TIMEOUT);