diff --git a/substrate/frame/asset-rate/src/lib.rs b/substrate/frame/asset-rate/src/lib.rs
index ca0285bb3ae16..c3dc551f876d0 100644
--- a/substrate/frame/asset-rate/src/lib.rs
+++ b/substrate/frame/asset-rate/src/lib.rs
@@ -165,7 +165,7 @@ pub mod pallet {
 				!ConversionRateToNative::<T>::contains_key(asset_kind.as_ref()),
 				Error::<T>::AlreadyExists
 			);
-			ConversionRateToNative::<T>::set(*asset_kind.clone(), Some(rate));
+			ConversionRateToNative::<T>::set(asset_kind.as_ref(), Some(rate));
 
 			Self::deposit_event(Event::AssetRateCreated { asset_kind: *asset_kind, rate });
 			Ok(())
@@ -185,7 +185,7 @@ pub mod pallet {
 			T::UpdateOrigin::ensure_origin(origin)?;
 
 			let mut old = FixedU128::zero();
-			ConversionRateToNative::<T>::mutate(*asset_kind.clone(), |maybe_rate| {
+			ConversionRateToNative::<T>::mutate(asset_kind.as_ref(), |maybe_rate| {
 				if let Some(r) = maybe_rate {
 					old = *r;
 					*r = rate;
@@ -214,10 +214,10 @@ pub mod pallet {
 			T::RemoveOrigin::ensure_origin(origin)?;
 
 			ensure!(
-				ConversionRateToNative::<T>::contains_key(*asset_kind.clone()),
+				ConversionRateToNative::<T>::contains_key(asset_kind.as_ref()),
 				Error::<T>::UnknownAssetKind
 			);
-			ConversionRateToNative::<T>::remove(*asset_kind.clone());
+			ConversionRateToNative::<T>::remove(asset_kind.as_ref());
 
 			Self::deposit_event(Event::AssetRateRemoved { asset_kind: *asset_kind });
 			Ok(())