diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 079a525f9512..eae8da8dab91 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -785,7 +785,7 @@ impl<T: ?Sized> AsMut<T> for Box<T> {
     }
 }
 
-#[unstable(feature = "generator_trait", issue = "0")]
+#[unstable(feature = "generator_trait", issue = "43122")]
 impl<T, U> Generator<U> for Box<T>
     where T: Generator<U> + ?Sized
 {
diff --git a/src/libcore/ops/mod.rs b/src/libcore/ops/mod.rs
index a51b19110280..0f415a60c807 100644
--- a/src/libcore/ops/mod.rs
+++ b/src/libcore/ops/mod.rs
@@ -190,7 +190,7 @@ pub use self::range::{RangeInclusive, RangeToInclusive};
 #[unstable(feature = "try_trait", issue = "42327")]
 pub use self::try::Try;
 
-#[unstable(feature = "generator_trait", issue = "0")]
+#[unstable(feature = "generator_trait", issue = "43122")]
 pub use self::generator::{Generator, State};
 
 #[unstable(feature = "placement_new_protocol", issue = "27779")]