diff --git a/packages/auth/src/login-button.js b/packages/auth/src/login-button.js
index 6dd94f278376778bbd1ba2a253ca8f605fa7f2c7..265ccf4ed132c78125332e877f3edf59b5d632bb 100644
--- a/packages/auth/src/login-button.js
+++ b/packages/auth/src/login-button.js
@@ -109,9 +109,9 @@ export class LoginButton extends ScopedElementsMixin(LitElement) {
 
     static get styles() {
         // language=css
-        return css`
-            ${commonStyles.getThemeCSS()}
-
+        return [
+            commonStyles.getThemeCSS(),
+            css`
             :host {
                 display: inline-block;
             }
@@ -149,7 +149,8 @@ export class LoginButton extends ScopedElementsMixin(LitElement) {
             .login-box .label {
                 padding-left: 0.2em;
             }
-        `;
+            `
+        ];
     }
 
     render() {