diff --git a/credentials/oidc_credential_provider.go b/credentials/oidc_credential_provider.go
index 98ded60..928eb93 100644
--- a/credentials/oidc_credential_provider.go
+++ b/credentials/oidc_credential_provider.go
@@ -27,6 +27,7 @@ func (p *oidcCredentialsProvider) resolve() (*Config, error) {
 		RoleArn:           tea.String(roleArn),
 		OIDCProviderArn:   tea.String(oidcProviderArn),
 		OIDCTokenFilePath: tea.String(oidcTokenFilePath),
+		RoleSessionName:   tea.String("defaultSessionName"),
 	}
 	roleSessionName, ok := os.LookupEnv(ENVRoleSessionName)
 	if ok {
diff --git a/credentials/oidc_credential_provider_test.go b/credentials/oidc_credential_provider_test.go
index fbf1029..67b9acb 100644
--- a/credentials/oidc_credential_provider_test.go
+++ b/credentials/oidc_credential_provider_test.go
@@ -31,6 +31,15 @@ func TestOidcCredentialsProvider(t *testing.T) {
 	os.Setenv(ENVRoleArn, "roleArn")
 	os.Setenv(ENVOIDCProviderArn, "oidcProviderArn")
 	os.Setenv(ENVOIDCTokenFile, "oidcTokenFilePath")
+	os.Unsetenv(ENVRoleSessionName)
+	c, err = p.resolve()
+	assert.Nil(t, err)
+	assert.Equal(t, "roleArn", tea.StringValue(c.RoleArn))
+	assert.Equal(t, "oidcProviderArn", tea.StringValue(c.OIDCProviderArn))
+	assert.Equal(t, "oidcTokenFilePath", tea.StringValue(c.OIDCTokenFilePath))
+	assert.Equal(t, "defaultSessionName", tea.StringValue(c.RoleSessionName))
+	assert.Equal(t, "oidc_role_arn", tea.StringValue(c.Type))
+
 	os.Setenv(ENVRoleSessionName, "roleSessionName")
 	c, err = p.resolve()
 	assert.Nil(t, err)