diff --git a/packages/credential-provider-ini/src/resolveAssumeRoleCredentials.spec.ts b/packages/credential-provider-ini/src/resolveAssumeRoleCredentials.spec.ts
index 82fe32729a14b..405d670a7ef13 100644
--- a/packages/credential-provider-ini/src/resolveAssumeRoleCredentials.spec.ts
+++ b/packages/credential-provider-ini/src/resolveAssumeRoleCredentials.spec.ts
@@ -102,6 +102,7 @@ describe(resolveAssumeRoleCredentials.name, () => {
     role_arn: "mock_role_arn",
     role_session_name: "mock_role_session_name",
     external_id: "mock_external_id",
+    duration_seconds: "2000",
   });
 
   const getMockProfilesWithCredSource = (additionalData) => ({
@@ -176,6 +177,7 @@ describe(resolveAssumeRoleCredentials.name, () => {
       RoleArn: mockRoleAssumeParams.role_arn,
       RoleSessionName: mockRoleAssumeParams.role_session_name,
       ExternalId: mockRoleAssumeParams.external_id,
+      DurationSeconds: parseInt(mockRoleAssumeParams.duration_seconds),
     });
   });
 
@@ -191,6 +193,7 @@ describe(resolveAssumeRoleCredentials.name, () => {
       RoleArn: mockRoleAssumeParams.role_arn,
       RoleSessionName: mockRoleAssumeParams.role_session_name,
       ExternalId: mockRoleAssumeParams.external_id,
+      DurationSeconds: parseInt(mockRoleAssumeParams.duration_seconds),
     });
   });
 
@@ -207,6 +210,7 @@ describe(resolveAssumeRoleCredentials.name, () => {
       RoleArn: mockRoleAssumeParams.role_arn,
       RoleSessionName: `aws-sdk-js-${mockDateNow}`,
       ExternalId: mockRoleAssumeParams.external_id,
+      DurationSeconds: parseInt(mockRoleAssumeParams.duration_seconds),
     });
   });
 
@@ -253,6 +257,7 @@ describe(resolveAssumeRoleCredentials.name, () => {
       ExternalId: mockRoleAssumeParams.external_id,
       SerialNumber: mockMfaSerial,
       TokenCode: mockTokenCode,
+      DurationSeconds: parseInt(mockRoleAssumeParams.duration_seconds),
     });
   });
 });
diff --git a/packages/credential-provider-ini/src/resolveAssumeRoleCredentials.ts b/packages/credential-provider-ini/src/resolveAssumeRoleCredentials.ts
index b2d8d8567ee2b..f175ab54cd12a 100644
--- a/packages/credential-provider-ini/src/resolveAssumeRoleCredentials.ts
+++ b/packages/credential-provider-ini/src/resolveAssumeRoleCredentials.ts
@@ -39,6 +39,11 @@ export interface AssumeRoleParams {
    * The value provided by the MFA device.
    */
   TokenCode?: string;
+
+  /**
+   * The duration, in seconds, of the role session.
+   */
+  DurationSeconds?: number;
 }
 
 interface AssumeRoleWithSourceProfile extends Profile {
@@ -108,6 +113,7 @@ export const resolveAssumeRoleCredentials = async (
     RoleArn: data.role_arn!,
     RoleSessionName: data.role_session_name || `aws-sdk-js-${Date.now()}`,
     ExternalId: data.external_id,
+    DurationSeconds: parseInt(data.duration_seconds || "3600", 10),
   };
 
   const { mfa_serial } = data;