diff --git a/server/src/bin/lesavka-uvc.rs b/server/src/bin/lesavka-uvc.rs
index 85233c6..8299a2c 100644
--- a/server/src/bin/lesavka-uvc.rs
+++ b/server/src/bin/lesavka-uvc.rs
@@ -524,8 +524,9 @@ fn handle_data(
                     payload
                 );
             }
-            // ACK commit after we've processed the payload.
-            let _ = send_response(fd, uvc_send_response, &[]);
+            if std::env::var("LESAVKA_UVC_ACK_AFTER_DATA").is_ok() {
+                let _ = send_response(fd, uvc_send_response, &[]);
+            }
         }
     }
 }