diff --git a/server/src/bin/lesavka-uvc.rs b/server/src/bin/lesavka-uvc.rs
index 0605f0f..5258e6d 100644
--- a/server/src/bin/lesavka-uvc.rs
+++ b/server/src/bin/lesavka-uvc.rs
@@ -384,6 +384,9 @@ fn handle_setup(
             return;
         }
         *pending = Some(PendingRequest { interface, selector });
+        let len = req.w_length as usize;
+        let payload = vec![0u8; len.min(UVC_DATA_SIZE)];
+        let _ = send_response(fd, uvc_send_response, &payload);
         if debug {
             eprintln!(
                 "[lesavka-uvc] SET_CUR queued len={} iface={} sel={}",
@@ -522,8 +525,7 @@ fn handle_data(
                 );
             }
         }
-        // ACK the OUT transfer after we've processed the payload.
-        let _ = send_response(fd, uvc_send_response, &[]);
+        // No extra response required; ep0 data stage completion ends the control transfer.
     }
 }