diff --git a/source/catalog.html b/source/catalog.html
index d0f97e0..40d128f 100644
--- a/source/catalog.html
+++ b/source/catalog.html
@@ -24,7 +24,7 @@
       <a class="logo-text" href="index.html">
         <img src="/" width="100" height="100" alt="Логотип с текстом 'CAT ENERGY'">
       </a>
-      <button class="button" type="button">
+      <button class="header__button button button--mobile-open" type="button">
         <span class="visually-hidden">Расскрытие главного меню</span>
       </button>
       <nav class="header__navigation navigation">
diff --git a/source/index.html b/source/index.html
index 93e464d..daf40ff 100644
--- a/source/index.html
+++ b/source/index.html
@@ -24,7 +24,7 @@
       <a class="header__logo-text logo" href="#">
         <img class="logo-text" src="/" width="100" height="100" alt="Логотип с текстом 'CAT ENERGY'">
       </a>
-      <button class="header__button button" type="button">
+      <button class="header__button button button--mobile-open" type="button">
         <span class="visually-hidden">Расскрытие главного меню</span>
       </button>
       <nav class="header__navigation navigation">