1 files changed, 3 insertions, 0 deletions
diff --git a/src/lib.rs b/src/lib.rs
index 5f4e268..b8966ff 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -66,7 +66,10 @@
 //! ```
 
 #![doc(html_root_url = "https://matthiasbeyer.github.io/filters/")]
+#![cfg_attr(feature = "unstable-filter-as-fn", feature(unboxed_closures, fn_traits))]
 
 pub mod filter;
+#[macro_use]
+pub mod impl_traits;
 pub mod ops;