diff --git a/library/std/src/thread/scoped.rs b/library/std/src/thread/scoped.rs
index 0db938b9f39..cb5f48e5107 100644
--- a/library/std/src/thread/scoped.rs
+++ b/library/std/src/thread/scoped.rs
@@ -11,7 +11,7 @@
 /// See [`scope`] for details.
 pub struct Scope<'env> {
     data: ScopeData,
-    env: PhantomData<&'env ()>,
+    env: PhantomData<&'env mut &'env ()>,
 }
 
 /// An owned permission to join on a scoped thread (block on its termination).