diff --git a/futures-executor/src/enter.rs b/futures-executor/src/enter.rs
index b0e43e059..46e1bd147 100644
--- a/futures-executor/src/enter.rs
+++ b/futures-executor/src/enter.rs
@@ -1,7 +1,7 @@
 use std::cell::Cell;
 use std::fmt;
 
-std::thread_local!(static ENTERED: Cell<bool> = Cell::new(false));
+std::thread_local!(static ENTERED: Cell<bool> = const { Cell::new(false) });
 
 /// Represents an executor context.
 ///