diff --git a/packages/credential-provider-ini/src/fromIni.ts b/packages/credential-provider-ini/src/fromIni.ts
index 3b10eedb2857..253f5b3935e2 100644
--- a/packages/credential-provider-ini/src/fromIni.ts
+++ b/packages/credential-provider-ini/src/fromIni.ts
@@ -38,7 +38,12 @@ export interface FromIniInit extends SourceProfileInit, CredentialProviderOption
    */
   roleAssumerWithWebIdentity?: (params: AssumeRoleWithWebIdentityParams) => Promise<AwsCredentialIdentity>;
 
-  clientConfig?: any; // STSClientConfig;
+  /**
+   * STSClientConfig to be used for creating STS Client for assuming role.
+   * @internal
+   */
+  clientConfig?: any;
+
   clientPlugins?: Pluggable<any, any>[];
 }
 
diff --git a/packages/credential-provider-web-identity/src/fromWebToken.ts b/packages/credential-provider-web-identity/src/fromWebToken.ts
index d73283435540..c94b3725e6a6 100644
--- a/packages/credential-provider-web-identity/src/fromWebToken.ts
+++ b/packages/credential-provider-web-identity/src/fromWebToken.ts
@@ -136,9 +136,10 @@ export interface FromWebTokenInit
   roleAssumerWithWebIdentity?: (params: AssumeRoleWithWebIdentityParams) => Promise<AwsCredentialIdentity>;
 
   /**
+   * STSClientConfig to be used for creating STS Client for assuming role.
    * @internal
    */
-  clientConfig?: any; // STSClientConfig;
+  clientConfig?: any;
 
   /**
    * @internal