--- a/gfx/webrender_bindings/src/bindings.rs
+++ b/gfx/webrender_bindings/src/bindings.rs
@@ -666,16 +666,19 @@ impl ThreadListener for GeckoProfilerThr
         }
     }
 
     fn thread_stopped(&self, _: &str) {
         unsafe {
             gecko_profiler_unregister_thread();
         }
     }
+
+    fn new_render_backend_thread(&self, _renderer_id: Option<u64>) {
+    }
 }
 
 pub struct WrThreadPool(Arc<rayon::ThreadPool>);
 
 #[no_mangle]
 pub unsafe extern "C" fn wr_thread_pool_new() -> *mut WrThreadPool {
     let worker = rayon::ThreadPoolBuilder::new()
         .thread_name(|idx|{ format!("WRWorker#{}", idx) })