diff --git a/lib/ex_doc/formatter/html/templates/sidebar_template.eex b/lib/ex_doc/formatter/html/templates/sidebar_template.eex
index 27ef1f788..d4c7a2cb9 100644
--- a/lib/ex_doc/formatter/html/templates/sidebar_template.eex
+++ b/lib/ex_doc/formatter/html/templates/sidebar_template.eex
@@ -24,7 +24,7 @@
     <button type="submit" class="search-button">
       <span class="icon-search" aria-hidden="true"></span>
     </button>
-    <input name="q" type="text" id="search-list" class="search-input" placeholder="search" aria-label="Search" autocomplete="off" />
+    <input name="q" type="text" id="search-list" class="search-input" placeholder="Search" aria-label="Search" autocomplete="off" />
   </form>
 
   <ul class="sidebar-listNav">