diff --git a/server/src/bin/lesavka-uvc.rs b/server/src/bin/lesavka-uvc.rs
index 5258e6d..f4adcef 100644
--- a/server/src/bin/lesavka-uvc.rs
+++ b/server/src/bin/lesavka-uvc.rs
@@ -525,7 +525,8 @@ fn handle_data(
                 );
             }
         }
-        // No extra response required; ep0 data stage completion ends the control transfer.
+        // ACK the OUT transfer after we've processed the payload.
+        let _ = send_response(fd, uvc_send_response, &[]);
     }
 }