diff --git a/substrate/frame/asset-conversion/ops/src/mock.rs b/substrate/frame/asset-conversion/ops/src/mock.rs
index 91c18b2e79494..31c3bb41fd120 100644
--- a/substrate/frame/asset-conversion/ops/src/mock.rs
+++ b/substrate/frame/asset-conversion/ops/src/mock.rs
@@ -68,6 +68,7 @@ impl pallet_assets::Config<Instance1> for Test {
 	type Currency = Balances;
 	type CreateOrigin = AsEnsureOriginWithArg<EnsureSigned<Self::AccountId>>;
 	type ForceOrigin = frame_system::EnsureRoot<Self::AccountId>;
+	type Holder = ();
 	type Freezer = ();
 }
 
@@ -77,6 +78,7 @@ impl pallet_assets::Config<Instance2> for Test {
 	type CreateOrigin =
 		AsEnsureOriginWithArg<EnsureSignedBy<AssetConversionOrigin, Self::AccountId>>;
 	type ForceOrigin = frame_system::EnsureRoot<Self::AccountId>;
+	type Holder = ();
 	type Freezer = ();
 }