diff --git a/unknown-tokens/Cargo.toml b/unknown-tokens/Cargo.toml
index 383778f55..bbacff904 100644
--- a/unknown-tokens/Cargo.toml
+++ b/unknown-tokens/Cargo.toml
@@ -24,6 +24,7 @@ orml-xcm-support = { path = "../xcm-support", default-features = false }
 sp-core = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.39" }
 sp-io = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.39" }
 sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.39" }
+hex-literal = "0.3.1"
 
 [features]
 default = ["std"]
diff --git a/unknown-tokens/src/migrations.rs b/unknown-tokens/src/migrations.rs
index 69a4fa309..9c866d30c 100644
--- a/unknown-tokens/src/migrations.rs
+++ b/unknown-tokens/src/migrations.rs
@@ -31,7 +31,9 @@ mod v2 {
 
 		weight.saturating_accrue(T::DbWeight::get().reads(1));
 
-		let old_data = storage_iter::<u128>(module_prefix, storage_prefix).drain();
+		let old_data = storage_iter::<u128>(module_prefix, storage_prefix)
+			.drain()
+			.collect::<Vec<_>>();
 
 		for (raw_k, value) in old_data {
 			let mut full_key = Vec::new();
@@ -59,7 +61,7 @@ mod v2 {
 
 		let old_data = storage_iter::<u128>(module_prefix, storage_prefix)
 			.drain()
-			.collect::<sp_std::vec::Vec<_>>();
+			.collect::<Vec<_>>();
 
 		for (raw_k, value) in old_data {
 			let mut full_key = Vec::new();
diff --git a/unknown-tokens/src/tests.rs b/unknown-tokens/src/tests.rs
index 45d699ddb..66d573cc6 100644
--- a/unknown-tokens/src/tests.rs
+++ b/unknown-tokens/src/tests.rs
@@ -7,7 +7,10 @@ use mock::*;
 
 use frame_support::{
 	assert_err, assert_ok,
-	storage::migration::{get_storage_value, put_storage_value},
+	storage::{
+		migration::{get_storage_value, put_storage_value},
+		unhashed::put_raw,
+	},
 	traits::OnRuntimeUpgrade,
 };
 
@@ -250,3 +253,12 @@ fn from_unversioned_to_v2_storage() {
 		assert_eq!(crate::Migration::<Runtime>::on_runtime_upgrade(), Weight::zero());
 	});
 }
+
+#[test]
+fn migrate_should_not_panic() {
+	ExtBuilder.build().execute_with(|| {
+		put_raw(&hex_literal::hex!["8d4649c9ee31ba6b2d10c66f5fcc252e76391a415c3fca956dccff701fe02e98082b3a7e1c0db7de23c07c6f14cc6c51000100411f728d113b5f9fee983dba4cbb22827c05000106080081"], &hex_literal::hex!["0b2493d4010000000000000000000000"]);
+
+		crate::Migration::<Runtime>::on_runtime_upgrade();
+	});
+}