diff --git a/packages/types/src/interfaces/runtime/definitions.ts b/packages/types/src/interfaces/runtime/definitions.ts
index f4a4abd36a..5d22da43b6 100644
--- a/packages/types/src/interfaces/runtime/definitions.ts
+++ b/packages/types/src/interfaces/runtime/definitions.ts
@@ -102,6 +102,7 @@ export default {
       justification: 'Justification'
     },
     StorageData: 'Bytes',
+    TransactionPriority: 'u64',
     ValidatorId: 'AccountId',
     Weight: 'u64',
     WeightMultiplier: 'Fixed64',