diff --git a/pyogp/lib/base/message/message_template_parser.py b/pyogp/lib/base/message/message_template_parser.py
index a5c00eb..c6577d9 100644
--- a/pyogp/lib/base/message/message_template_parser.py
+++ b/pyogp/lib/base/message/message_template_parser.py
@@ -197,7 +197,7 @@ class MessageTemplateParser(object):
                     var_size = int(parts[2])
                     if var_size <= 0:
                         raise Exception('Bad variable size')
-
+                #if the size hasn't been read yet, then read it from message_types
                 if var_size == -1:
                     var_size = sizeof(var_type)