diff --git a/templates/logs.vhost.erb b/templates/logs.vhost.erb
index 3f9e125..7d9fb6a 100644
--- a/templates/logs.vhost.erb
+++ b/templates/logs.vhost.erb
@@ -23,6 +23,11 @@ NameVirtualHost <%= @vhost_name %>:<%= @port %>
     AddDefaultCharset UTF-8
     AddEncoding x-gzip gz
   </FilesMatch>
+  <FilesMatch \.css$>
+    # mod_mime_magic is sometimes passing css files as asm sources
+    # e.g css files generated by coverage reports
+    ForceType text/css
+  </FilesMatch>
   <Directory <%= @docroot %>>
     Options <%= @options %>
     AllowOverride None