diff --git a/src/components/main/constellation.rs b/src/components/main/constellation.rs
index 2b8c24c1da3..a7e06dd4a17 100644
--- a/src/components/main/constellation.rs
+++ b/src/components/main/constellation.rs
@@ -801,7 +801,7 @@ impl Constellation {
     fn set_ids(&self, frame_tree: @mut FrameTree) {
         let (port, chan) = comm::stream();
         self.compositor_chan.send(SetIds(frame_tree.to_sendable(), chan, self.chan.clone()));
-        port.recv();
+        port.try_recv();
         for frame in frame_tree.iter() {
             frame.pipeline.grant_paint_permission();
         }
diff --git a/src/components/main/pipeline.rs b/src/components/main/pipeline.rs
index 4e7f7c066cf..1f7dbb8eef9 100644
--- a/src/components/main/pipeline.rs
+++ b/src/components/main/pipeline.rs
@@ -200,7 +200,7 @@ impl Pipeline {
     }
 
     pub fn grant_paint_permission(&self) {
-        self.render_chan.send(PaintPermissionGranted);
+        self.render_chan.try_send(PaintPermissionGranted);
     }
 
     pub fn revoke_paint_permission(&self) {