1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib.rs b/src/lib.rs
index a117ccc..3bddf1b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(feature = "factory", feature(unboxed_closures, fn_traits))]
+#![cfg_attr(feature = "factory", feature(unboxed_closures, fn_traits, tuple_trait))]
 #![cfg_attr(doc_cfg, feature(doc_cfg))]
 #![deny(clippy::all)]
 #![deny(clippy::pedantic)]