diff --git a/lib/librevox/command_socket.rb b/lib/librevox/command_socket.rb
index f399c51..6efc735 100644
--- a/lib/librevox/command_socket.rb
+++ b/lib/librevox/command_socket.rb
@@ -33,8 +33,7 @@ def read_response
       end
 
       length = response.headers[:content_length].to_i
-      response.content = @socket.read(length) if length > 0
-
+      response.instance_variable_set(:@content, length > 0 ? @socket.read(length) : "")
       response
     end