diff --git a/blocks/blog_menu/block_blog_menu.php b/blocks/blog_menu/block_blog_menu.php
index 71fd4221f27..7bc53b130c9 100644
--- a/blocks/blog_menu/block_blog_menu.php
+++ b/blocks/blog_menu/block_blog_menu.php
@@ -99,10 +99,14 @@ class block_blog_menu extends block_base {
         // Prepare the footer for this block
         if (has_capability('moodle/blog:search', context_system::instance())) {
             // Full-text search field
-            $form  = html_writer::tag('label', get_string('search', 'admin'), array('for'=>'blogsearchquery', 'class'=>'accesshide'));
-            $form .= html_writer::empty_tag('input', array('id'=>'blogsearchquery', 'type'=>'text', 'name'=>'search'));
-            $form .= html_writer::empty_tag('input', array('type'=>'submit', 'value'=>get_string('search')));
-            $this->content->footer = html_writer::tag('form', html_writer::tag('div', $form), array('class'=>'blogsearchform', 'method'=>'get', 'action'=>new moodle_url('/blog/index.php')));
+            $form  = html_writer::tag('label', get_string('search', 'admin'), array('for' => 'blogsearchquery',
+                'class' => 'accesshide'));
+            $form .= html_writer::empty_tag('input', array('id' => 'blogsearchquery', 'class' => 'form-control mr-1',
+                'type' => 'text', 'name' => 'search'));
+            $form .= html_writer::empty_tag('input', array('type' => 'submit', 'class' => 'btn btn-secondary',
+                'value' => get_string('search')));
+            $this->content->footer = html_writer::tag('form', html_writer::tag('div', $form), array(
+                'class' => 'blogsearchform form-inline', 'method' => 'get', 'action' => new moodle_url('/blog/index.php')));
         } else {
             // No footer to display
             $this->content->footer = '';