1 files changed, 1 insertions, 1 deletions
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index abe2071973b..bfd806f99e7 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -892,7 +892,7 @@ impl<T> Generator for Box<T>
 {
     type Yield = T::Yield;
     type Return = T::Return;
-    fn resume(&mut self) -> GeneratorState<Self::Yield, Self::Return> {
+    unsafe fn resume(&mut self) -> GeneratorState<Self::Yield, Self::Return> {
         (**self).resume()
     }
 }