diff --git a/virtio-devices/src/balloon.rs b/virtio-devices/src/balloon.rs
index 70318a3ce..26728f03f 100644
--- a/virtio-devices/src/balloon.rs
+++ b/virtio-devices/src/balloon.rs
@@ -322,7 +322,7 @@ impl BalloonEpollHandler {
             }
 
             self.queues[queue_index]
-                .add_used(desc_chain.memory(), desc_chain.head_index(), desc.len())
+                .add_used(desc_chain.memory(), desc_chain.head_index(), 0)
                 .map_err(Error::QueueAddUsed)?;
             used_descs = true;
         }