diff --git a/block/ssh.c b/block/ssh.c
index 9eb33df..f9e08a4 100644
--- a/block/ssh.c
+++ b/block/ssh.c
@@ -883,6 +883,10 @@
     /* Go non-blocking. */
     ssh_set_blocking(s->session, 0);
 
+    if (s->attrs->type == SSH_FILEXFER_TYPE_REGULAR) {
+        bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE;
+    }
+
     qapi_free_BlockdevOptionsSsh(opts);
 
     return 0;