diff --git a/app/views/hooks/login/_providers.html.erb b/app/views/hooks/login/_providers.html.erb
index 11bc2c50de..c172d1eeaf 100644
--- a/app/views/hooks/login/_providers.html.erb
+++ b/app/views/hooks/login/_providers.html.erb
@@ -40,19 +40,21 @@ See doc/COPYRIGHT.rdoc for more details.
     end
   %>
   <a href="<%= url_for opts %>" class="auth-provider auth-provider-<%= pro[:name] %> button">
-    <style type="text/css" scoped="scoped">
-      <% if pro[:icon] %>
-        #content .login-auth-providers a.auth-provider.auth-provider-<%= pro[:name] %> {
-          background-image: url('<%= image_path(pro[:icon]) %>');
-        }
-        #top-menu #nav-login-content .login-auth-providers a.auth-provider.auth-provider-<%= pro[:name] %> {
-          background-image: url('<%= image_path(pro[:icon]) %>') ;
-        }
-        .modal-wrapper .login-auth-providers a.auth-provider.auth-provider-<%= pro[:name] %> {
-          background-image: url('<%= image_path(pro[:icon]) %>') ;
-        }
+    <% if pro[:icon] %>
+      <%= content_for :header_tags do %>
+        <style type="text/css">
+            #content .login-auth-providers a.auth-provider.auth-provider-<%= pro[:name] %> {
+              background-image: url('<%= image_path(pro[:icon]) %>');
+            }
+            #top-menu #nav-login-content .login-auth-providers a.auth-provider.auth-provider-<%= pro[:name] %> {
+              background-image: url('<%= image_path(pro[:icon]) %>') ;
+            }
+            .modal-wrapper .login-auth-providers a.auth-provider.auth-provider-<%= pro[:name] %> {
+              background-image: url('<%= image_path(pro[:icon]) %>') ;
+            }
+        </style>
       <% end %>
-    </style>
+    <% end -%>
     <span class="auth-provider-name"><%= pro[:display_name] || pro[:name] %></span>
   </a>
 <% end %>
diff --git a/spec/views/hooks/login/_providers.html.erb_spec.rb b/spec/views/hooks/login/_providers.html.erb_spec.rb
index 60ea99e042..a6a313ea38 100644
--- a/spec/views/hooks/login/_providers.html.erb_spec.rb
+++ b/spec/views/hooks/login/_providers.html.erb_spec.rb
@@ -37,6 +37,7 @@ describe 'rendering the login buttons for all providers' do
     ]
   end
 
+
   before do
     allow(OpenProject::Plugins::AuthPlugin).to receive(:providers).and_return(providers)
 
@@ -52,6 +53,6 @@ describe 'rendering the login buttons for all providers' do
   end
 
   it 'should render a custom icon if defined' do
-    expect(rendered).to match /#{providers[2][:icon]}/
+    expect(view.content_for(:header_tags)).to match /#{providers[2][:icon]}/
   end
 end