diff --git a/packages/google-cloud-security-privateca/src/v1beta1/certificate_authority_service_client.ts b/packages/google-cloud-security-privateca/src/v1beta1/certificate_authority_service_client.ts
index a03a0077b2b..977d755822a 100644
--- a/packages/google-cloud-security-privateca/src/v1beta1/certificate_authority_service_client.ts
+++ b/packages/google-cloud-security-privateca/src/v1beta1/certificate_authority_service_client.ts
@@ -221,7 +221,25 @@ export class CertificateAuthorityServiceClient {
     };
     if (opts.fallback === 'rest') {
       lroOptions.protoJson = protoFilesRoot;
-      lroOptions.httpRules = [];
+      lroOptions.httpRules = [
+        {
+          selector: 'google.longrunning.Operations.CancelOperation',
+          post: '/v1beta1/{name=projects/*/locations/*/operations/*}:cancel',
+          body: '*',
+        },
+        {
+          selector: 'google.longrunning.Operations.DeleteOperation',
+          delete: '/v1beta1/{name=projects/*/locations/*/operations/*}',
+        },
+        {
+          selector: 'google.longrunning.Operations.GetOperation',
+          get: '/v1beta1/{name=projects/*/locations/*/operations/*}',
+        },
+        {
+          selector: 'google.longrunning.Operations.ListOperations',
+          get: '/v1beta1/{name=projects/*/locations/*}/operations',
+        },
+      ];
     }
     this.operationsClient = this._gaxModule
       .lro(lroOptions)