diff --git a/lib/ticketmaster/common.rb b/lib/ticketmaster/common.rb
index dc3a30f..2eb68b7 100644
--- a/lib/ticketmaster/common.rb
+++ b/lib/ticketmaster/common.rb
@@ -33,8 +33,8 @@ def initialize(*options)
             super(first.to_hash)
           else
             @system_data[:client] = first
-            self.prefix_options ||= @system_data[:client].prefix_options if @system_data[:client].prefix_options
-            super(first.attributes)
+            self.prefix_options ||= @system_data[:client].prefix_options if @system_data[:client] and @system_data[:client].prefix_options
+            super(first.attributes) if first
         end
       end