diff --git a/substrate/primitives/std/src/lib.rs b/substrate/primitives/std/src/lib.rs
index 03a079e396..05dff0f307 100644
--- a/substrate/primitives/std/src/lib.rs
+++ b/substrate/primitives/std/src/lib.rs
@@ -99,6 +99,7 @@ impl Writer {
 /// This should include only things which are in the normal std prelude.
 pub mod prelude {
 	pub use crate::{
+		borrow::ToOwned,
 		boxed::Box,
 		clone::Clone,
 		cmp::{Eq, PartialEq, Reverse},