diff --git a/packages/api/src/types/submittable.ts b/packages/api/src/types/submittable.ts
index e17d6e8b66..3dc92f0be4 100644
--- a/packages/api/src/types/submittable.ts
+++ b/packages/api/src/types/submittable.ts
@@ -2,7 +2,7 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import { AnyFunction, CallFunction } from '@polkadot/types/types';
+import { AnyFunction, CallBase } from '@polkadot/types/types';
 
 import { SubmittableExtrinsic } from '../submittable/types';
 import { ApiTypes } from './base';
@@ -10,9 +10,9 @@ import { ApiTypes } from './base';
 // eslint-disable-next-line @typescript-eslint/no-empty-interface
 export interface AugmentedSubmittables<ApiType extends ApiTypes> { }
 
-export type AugmentedSubmittable<T extends AnyFunction> = T & CallFunction;
+export type AugmentedSubmittable<T extends AnyFunction> = T & CallBase;
 
-export interface SubmittableExtrinsicFunction<ApiType extends ApiTypes> extends CallFunction {
+export interface SubmittableExtrinsicFunction<ApiType extends ApiTypes> extends CallBase {
   (...params: any[]): SubmittableExtrinsic<ApiType>;
 }
 
diff --git a/packages/types/src/types.ts b/packages/types/src/types.ts
index 903dbe867b..50216280e0 100644
--- a/packages/types/src/types.ts
+++ b/packages/types/src/types.ts
@@ -22,8 +22,7 @@ export type BareOpts = boolean | Record<string, boolean>;
 
 export type InterfaceTypes = keyof InterfaceRegistry;
 
-export interface CallFunction {
-  (...args: any[]): Call;
+export interface CallBase {
   callIndex: Uint8Array;
   meta: FunctionMetadataLatest;
   method: string;
@@ -31,6 +30,10 @@ export interface CallFunction {
   toJSON: () => any;
 }
 
+export interface CallFunction extends CallBase {
+  (...args: any[]): Call;
+}
+
 export type Calls = Record<string, CallFunction>;
 
 export type ModulesWithCalls = Record<string, Calls>;