diff --git a/CHANGELOG.md b/CHANGELOG.md
index d7c4275c21c1..ca2ed2de3651 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 Changes:
 
 - Adjust `pendingRewards` for pools runtime calls
+- Support for `AccountId33` (raw/compressed 33-byte ecdsa)
 - Update to latest Substrate, Polkadot & Kusama metadata
 
 
diff --git a/packages/types-augment/src/registry/interfaces.ts b/packages/types-augment/src/registry/interfaces.ts
index 530ac825b2e2..be57e64572b8 100644
--- a/packages/types-augment/src/registry/interfaces.ts
+++ b/packages/types-augment/src/registry/interfaces.ts
@@ -52,7 +52,7 @@ import type { ProxyAnnouncement, ProxyDefinition, ProxyType } from '@polkadot/ty
 import type { AccountStatus, AccountValidity } from '@polkadot/types/interfaces/purchase';
 import type { ActiveRecovery, RecoveryConfig } from '@polkadot/types/interfaces/recovery';
 import type { RpcMethods } from '@polkadot/types/interfaces/rpc';
-import type { AccountId, AccountId20, AccountId32, AccountIdOf, AccountIndex, Address, AssetId, Balance, BalanceOf, Block, BlockNumber, BlockNumberFor, BlockNumberOf, Call, CallHash, CallHashOf, ChangesTrieConfiguration, ChangesTrieSignal, CodecHash, Consensus, ConsensusEngineId, CrateVersion, Digest, DigestItem, EncodedJustification, ExtrinsicsWeight, Fixed128, Fixed64, FixedI128, FixedI64, FixedU128, FixedU64, H1024, H128, H160, H2048, H256, H32, H512, H64, Hash, Header, HeaderPartial, I32F32, Index, IndicesLookupSource, Justification, Justifications, KeyTypeId, KeyValue, LockIdentifier, LookupSource, LookupTarget, ModuleId, Moment, MultiAddress, MultiSigner, OpaqueCall, Origin, OriginCaller, PalletId, PalletVersion, PalletsOrigin, Pays, PerU16, Perbill, Percent, Permill, Perquintill, Phantom, PhantomData, PreRuntime, Releases, RuntimeDbWeight, Seal, SealV0, SignedBlock, SignedBlockWithJustification, SignedBlockWithJustifications, Slot, SlotDuration, StorageData, StorageInfo, StorageProof, TransactionInfo, TransactionLongevity, TransactionPriority, TransactionStorageProof, TransactionTag, U32F32, ValidatorId, ValidatorIdOf, Weight, WeightMultiplier } from '@polkadot/types/interfaces/runtime';
+import type { AccountId, AccountId20, AccountId32, AccountId33, AccountIdOf, AccountIndex, Address, AssetId, Balance, BalanceOf, Block, BlockNumber, BlockNumberFor, BlockNumberOf, Call, CallHash, CallHashOf, ChangesTrieConfiguration, ChangesTrieSignal, CodecHash, Consensus, ConsensusEngineId, CrateVersion, Digest, DigestItem, EncodedJustification, ExtrinsicsWeight, Fixed128, Fixed64, FixedI128, FixedI64, FixedU128, FixedU64, H1024, H128, H160, H2048, H256, H32, H512, H64, Hash, Header, HeaderPartial, I32F32, Index, IndicesLookupSource, Justification, Justifications, KeyTypeId, KeyValue, LockIdentifier, LookupSource, LookupTarget, ModuleId, Moment, MultiAddress, MultiSigner, OpaqueCall, Origin, OriginCaller, PalletId, PalletVersion, PalletsOrigin, Pays, PerU16, Perbill, Percent, Permill, Perquintill, Phantom, PhantomData, PreRuntime, Releases, RuntimeDbWeight, Seal, SealV0, SignedBlock, SignedBlockWithJustification, SignedBlockWithJustifications, Slot, SlotDuration, StorageData, StorageInfo, StorageProof, TransactionInfo, TransactionLongevity, TransactionPriority, TransactionStorageProof, TransactionTag, U32F32, ValidatorId, ValidatorIdOf, Weight, WeightMultiplier } from '@polkadot/types/interfaces/runtime';
 import type { Si0Field, Si0LookupTypeId, Si0Path, Si0Type, Si0TypeDef, Si0TypeDefArray, Si0TypeDefBitSequence, Si0TypeDefCompact, Si0TypeDefComposite, Si0TypeDefPhantom, Si0TypeDefPrimitive, Si0TypeDefSequence, Si0TypeDefTuple, Si0TypeDefVariant, Si0TypeParameter, Si0Variant, Si1Field, Si1LookupTypeId, Si1Path, Si1Type, Si1TypeDef, Si1TypeDefArray, Si1TypeDefBitSequence, Si1TypeDefCompact, Si1TypeDefComposite, Si1TypeDefPrimitive, Si1TypeDefSequence, Si1TypeDefTuple, Si1TypeDefVariant, Si1TypeParameter, Si1Variant, SiField, SiLookupTypeId, SiPath, SiType, SiTypeDef, SiTypeDefArray, SiTypeDefBitSequence, SiTypeDefCompact, SiTypeDefComposite, SiTypeDefPrimitive, SiTypeDefSequence, SiTypeDefTuple, SiTypeDefVariant, SiTypeParameter, SiVariant } from '@polkadot/types/interfaces/scaleInfo';
 import type { Period, Priority, SchedulePeriod, SchedulePriority, Scheduled, ScheduledTo254, TaskAddress } from '@polkadot/types/interfaces/scheduler';
 import type { BeefyKey, FullIdentification, IdentificationTuple, Keys, MembershipProof, SessionIndex, SessionKeys1, SessionKeys10, SessionKeys10B, SessionKeys2, SessionKeys3, SessionKeys4, SessionKeys5, SessionKeys6, SessionKeys6B, SessionKeys7, SessionKeys7B, SessionKeys8, SessionKeys8B, SessionKeys9, SessionKeys9B, ValidatorCount } from '@polkadot/types/interfaces/session';
@@ -78,6 +78,7 @@ declare module '@polkadot/types/types/registry' {
     AccountId: AccountId;
     AccountId20: AccountId20;
     AccountId32: AccountId32;
+    AccountId33: AccountId33;
     AccountIdOf: AccountIdOf;
     AccountIndex: AccountIndex;
     AccountInfo: AccountInfo;
diff --git a/packages/types/src/generic/AccountId.spec.ts b/packages/types/src/generic/AccountId.spec.ts
index 21f4bb4d6170..76c6c4105db5 100644
--- a/packages/types/src/generic/AccountId.spec.ts
+++ b/packages/types/src/generic/AccountId.spec.ts
@@ -7,7 +7,6 @@ import { Raw } from '@polkadot/types-codec';
 import jsonVec from '@polkadot/types-support/json/AccountIdVec.001.json' assert { type: 'json' };
 
 import { TypeRegistry } from '../create';
-import { GenericAccountId as AccountId } from '.';
 
 describe('AccountId', (): void => {
   const registry = new TypeRegistry();
@@ -37,7 +36,7 @@ describe('AccountId', (): void => {
   });
 
   describe('decoding', (): void => {
-    const testDecode = (type: string, input: Uint8Array | string | AccountId, expected: string): void =>
+    const testDecode = (type: string, input: Uint8Array | string, expected: string): void =>
       it(`can decode from ${type}`, (): void => {
         expect(
           registry
@@ -57,6 +56,11 @@ describe('AccountId', (): void => {
       registry.createType('AccountId', '0x0102030405060708010203040506070801020304050607080102030405060708'),
       '5C62W7ELLAAfix9LYrcx5smtcffbhvThkM5x7xfMeYXCtGwF'
     );
+    testDecode(
+      'AccountId33',
+      registry.createType('AccountId33', '0x098765430987654309876543098765430987654309876543098765430987654309'),
+      '5CHCWUYMmDGeJjiuaQ1LnrsAWacDhiTAV6vCfytSxoqBdCCb'
+    );
     testDecode('hex', '0x0102030405060708010203040506070801020304050607080102030405060708', '5C62W7ELLAAfix9LYrcx5smtcffbhvThkM5x7xfMeYXCtGwF');
     testDecode('string', '5C62W7ELLAAfix9LYrcx5smtcffbhvThkM5x7xfMeYXCtGwF', '5C62W7ELLAAfix9LYrcx5smtcffbhvThkM5x7xfMeYXCtGwF');
     testDecode(
diff --git a/packages/types/src/generic/AccountId.ts b/packages/types/src/generic/AccountId.ts
index 57ff045d2986..197ff47e1fc5 100644
--- a/packages/types/src/generic/AccountId.ts
+++ b/packages/types/src/generic/AccountId.ts
@@ -22,20 +22,14 @@ function decodeAccountId (value?: AnyU8a | AnyString): Uint8Array {
   throw new Error(`Unknown type passed to AccountId constructor, found typeof ${typeof value}`);
 }
 
-/**
- * @name GenericAccountId
- * @description
- * A wrapper around an AccountId/PublicKey representation. Since we are dealing with
- * underlying PublicKeys (32 bytes in length), we extend from U8aFixed which is
- * just a Uint8Array wrapper with a fixed length.
- */
-export class GenericAccountId extends U8aFixed {
-  constructor (registry: Registry, value?: AnyU8a) {
+class BaseAccountId extends U8aFixed {
+  constructor (registry: Registry, allowedBits = 256 | 264, value?: AnyU8a) {
     const decoded = decodeAccountId(value);
+    const decodedBits = decoded.length * 8;
 
     // Part of stream containing >= 32 bytes or a all empty (defaults)
-    if (decoded.length < 32 && decoded.some((b) => b)) {
-      throw new Error(`Invalid AccountId provided, expected 32 bytes, found ${decoded.length}`);
+    if (decodedBits < allowedBits && decoded.some((b) => b)) {
+      throw new Error(`Invalid AccountId provided, expected ${allowedBits >> 3} bytes, found ${decoded.length}`);
     }
 
     super(registry, decoded, 256);
@@ -83,3 +77,22 @@ export class GenericAccountId extends U8aFixed {
     return 'AccountId';
   }
 }
+
+/**
+ * @name GenericAccountId
+ * @description
+ * A wrapper around an AccountId/PublicKey representation. Since we are dealing with
+ * underlying PublicKeys (32 bytes in length), we extend from U8aFixed which is
+ * just a Uint8Array wrapper with a fixed length.
+ */
+export class GenericAccountId extends BaseAccountId {
+  constructor (registry: Registry, value?: AnyU8a) {
+    super(registry, 256, value);
+  }
+}
+
+export class GenericAccountId33 extends BaseAccountId {
+  constructor (registry: Registry, value?: AnyU8a) {
+    super(registry, 264, value);
+  }
+}
diff --git a/packages/types/src/generic/index.ts b/packages/types/src/generic/index.ts
index 4d05e32afa4d..5d10f9bcea91 100644
--- a/packages/types/src/generic/index.ts
+++ b/packages/types/src/generic/index.ts
@@ -3,7 +3,7 @@
 
 export * from '../ethereum';
 
-export { GenericAccountId } from './AccountId';
+export { GenericAccountId, GenericAccountId as GenericAccountId32, GenericAccountId33 } from './AccountId';
 export { GenericAccountIndex } from './AccountIndex';
 export { GenericBlock } from './Block';
 export { GenericCall } from './Call';
diff --git a/packages/types/src/interfaces/runtime/definitions.ts b/packages/types/src/interfaces/runtime/definitions.ts
index fba5e68a57e2..fed46ec39e16 100644
--- a/packages/types/src/interfaces/runtime/definitions.ts
+++ b/packages/types/src/interfaces/runtime/definitions.ts
@@ -53,7 +53,8 @@ export default {
   types: objectSpread({}, numberTypes, {
     AccountId: 'AccountId32',
     AccountId20: 'GenericEthereumAccountId',
-    AccountId32: 'GenericAccountId',
+    AccountId32: 'GenericAccountId32',
+    AccountId33: 'GenericAccountId33',
     AccountIdOf: 'AccountId',
     AccountIndex: 'GenericAccountIndex',
     Address: 'MultiAddress',
diff --git a/packages/types/src/interfaces/runtime/types.ts b/packages/types/src/interfaces/runtime/types.ts
index 6996860f018b..68632ae53856 100644
--- a/packages/types/src/interfaces/runtime/types.ts
+++ b/packages/types/src/interfaces/runtime/types.ts
@@ -1,7 +1,7 @@
 // Auto-generated via `yarn polkadot-types-from-defs`, do not edit
 /* eslint-disable */
 
-import type { GenericAccountId, GenericAccountIndex, GenericBlock, GenericCall, GenericConsensusEngineId, GenericEthereumAccountId, GenericLookupSource, GenericMultiAddress, StorageKey } from '@polkadot/types';
+import type { GenericAccountId32, GenericAccountId33, GenericAccountIndex, GenericBlock, GenericCall, GenericConsensusEngineId, GenericEthereumAccountId, GenericLookupSource, GenericMultiAddress, StorageKey } from '@polkadot/types';
 import type { Bytes, Compact, DoNotConstruct, Enum, Int, Null, Option, Struct, U8aFixed, UInt, Vec, u16, u32, u64, u8 } from '@polkadot/types-codec';
 import type { ITuple } from '@polkadot/types-codec/types';
 import type { AuthorityId } from '@polkadot/types/interfaces/consensus';
@@ -15,7 +15,10 @@ export interface AccountId extends AccountId32 {}
 export interface AccountId20 extends GenericEthereumAccountId {}
 
 /** @name AccountId32 */
-export interface AccountId32 extends GenericAccountId {}
+export interface AccountId32 extends GenericAccountId32 {}
+
+/** @name AccountId33 */
+export interface AccountId33 extends GenericAccountId33 {}
 
 /** @name AccountIdOf */
 export interface AccountIdOf extends AccountId {}