diff --git a/web/src/pages/providers/proxy/ProxyProviderForm.ts b/web/src/pages/providers/proxy/ProxyProviderForm.ts
index 79a4a244e..9303c5345 100644
--- a/web/src/pages/providers/proxy/ProxyProviderForm.ts
+++ b/web/src/pages/providers/proxy/ProxyProviderForm.ts
@@ -154,6 +154,7 @@ export class ProxyProviderFormPage extends ModelForm<ProxyProvider, number> {
                         label=${t`Certificate`}
                         name="certificate">
                         <select class="pf-c-form-control">
+                            <option value="" ?selected=${this.instance?.certificate === undefined}>---------</option>
                             ${until(new CryptoApi(DEFAULT_CONFIG).cryptoCertificatekeypairsList({
                                 ordering: "pk",
                                 hasKey: "true",