1 files changed, 2 insertions, 1 deletions
diff --git a/components/style/thread_state.rs b/components/style/thread_state.rs
index 12e52425f55..b0fbd5f4294 100644
--- a/components/style/thread_state.rs
+++ b/components/style/thread_state.rs
@@ -72,7 +72,8 @@ mod imp {
     pub fn get() -> ThreadState {
         let state = STATE.with(|ref k| {
             match *k.borrow() {
-                None => panic!("Thread state not initialized"),
+                // This is one of the layout threads, that use rayon.
+                None => super::LAYOUT | super::IN_WORKER,
                 Some(s) => s,
             }
         });