diff --git a/src/CertificateAuthorityService/Resource/ProjectsLocationsCaPoolsCertificates.php b/src/CertificateAuthorityService/Resource/ProjectsLocationsCaPoolsCertificates.php
index aa9621c80f..51e153d625 100644
--- a/src/CertificateAuthorityService/Resource/ProjectsLocationsCaPoolsCertificates.php
+++ b/src/CertificateAuthorityService/Resource/ProjectsLocationsCaPoolsCertificates.php
@@ -43,7 +43,7 @@ class ProjectsLocationsCaPoolsCertificates extends \Google\Service\Resource
    * @opt_param string certificateId Optional. It must be unique within a location
    * and match the regular expression `[a-zA-Z0-9_-]{1,63}`. This field is
    * required when using a CertificateAuthority in the Enterprise
-   * CertificateAuthority.Tier, but is optional and its value is ignored
+   * CertificateAuthority.tier, but is optional and its value is ignored
    * otherwise.
    * @opt_param string issuingCertificateAuthorityId Optional. The resource ID of
    * the CertificateAuthority that should issue the certificate. This optional