diff --git a/source/module.rb b/source/module.rb
index d683988..bfc084a 100644
--- a/source/module.rb
+++ b/source/module.rb
@@ -89,8 +89,12 @@ module Vrobot4::Module
 
    @@module_types = {}
 
-   def self.add_module_type t, name, server: nil
-      @@module_types[name] = {:type => t, :server => server}
+   def self.add_module_type type, name, server: nil, servflags: nil
+      @@module_types[name] = {
+         :type      => type,
+         :server    => server,
+         :servflags => servflags ? /[#{servflags}]/ : nil
+      }
       Vrobot4.log :INFO, "added module type:", name
    end
 
diff --git a/source/server.rb b/source/server.rb
index 4fa01ec..824ca29 100644
--- a/source/server.rb
+++ b/source/server.rb
@@ -46,7 +46,8 @@ module Vrobot4::Server
 
       def load_mod mod
          mt = Vrobot4::Module.get_module_type(mod)
-         if mt[:server] and mt[:server] != type
+         if mt[:server]    and mt[:server]    != type or
+            mt[:servflags] and mt[:servflags] !~ flags
             raise ArgumentError, "Module " + mod + " not valid for this server"
          end
          @modules << mt[:type].new
@@ -75,6 +76,10 @@ module Vrobot4::Server
          "Unknown"
       end
 
+      def flags
+         ""
+      end
+
       private
       def load_permissions pinf
          @mprm = {:chan => {}, :role => {}, :glob => {}}
diff --git a/source/sv_discord.rb b/source/sv_discord.rb
index 32a9ac6..d7fa00c 100644
--- a/source/sv_discord.rb
+++ b/source/sv_discord.rb
@@ -64,6 +64,10 @@ class Sv_Discord < Vrobot4::Server::Server
    def type
       "Discord"
    end
+
+   def flags
+      "AD"
+   end
 end
 
 ## EOF