diff --git a/substrate/core/sr-std/with_std.rs b/substrate/core/sr-std/with_std.rs
index 9d8a7342f3..9bf49ce6ed 100644
--- a/substrate/core/sr-std/with_std.rs
+++ b/substrate/core/sr-std/with_std.rs
@@ -35,4 +35,5 @@ pub use std::result;
 
 pub mod collections {
 	pub use std::collections::btree_map;
+	pub use std::collections::btree_set;
 }