diff --git a/app/assets/images/header-logo-madrid.png b/app/assets/images/header_logo_madrid.png
similarity index 100%
rename from app/assets/images/header-logo-madrid.png
rename to app/assets/images/header_logo_madrid.png
diff --git a/app/assets/images/home-header-bg.jpg b/app/assets/images/home_header_bg.jpg
similarity index 100%
rename from app/assets/images/home-header-bg.jpg
rename to app/assets/images/home_header_bg.jpg
diff --git a/app/assets/images/user_default.jpg b/app/assets/images/user_default.jpg
new file mode 100644
index 000000000..c67f27f55
Binary files /dev/null and b/app/assets/images/user_default.jpg differ
diff --git a/app/views/layouts/_header.html.erb b/app/views/layouts/_header.html.erb
index 773bb1e46..95b5fb7af 100644
--- a/app/views/layouts/_header.html.erb
+++ b/app/views/layouts/_header.html.erb
@@ -14,7 +14,7 @@
 			<ul class="title-area">
 				<li class="name">
 					<%= link_to root_path do %>
-						<%= image_tag('header-logo-madrid.png', class: 'left', size: '96x96') %>
+						<%= image_tag('header_logo_madrid.png', class: 'left', size: '96x96') %>
 						<%= t("layouts.header.open_gov", open: "<strong>#{t('layouts.header.open')}</strong>").html_safe %> | <span><%= t("layouts.header.participation") %></span>
 					<% end %>
 				</li>